Budget-Friendly Developer Tools

ACI.dev

Free tier available

Open-source (Apache-2.0) tool-calling platform: 600+ integrations, multi-tenant OAuth for end users, and a unified MCP server.

Arcade

Free tier available

MCP runtime that lets agents act as the signed-in user, with per-call authorization, policy hooks and 8,000+ permission-aware tools.

Composio

Free tier available

Managed tool calling and OAuth for AI agents: 1,500+ app integrations, triggers and an MCP gateway, with a free tier of 100K tool calls a month.

Nango

Free tier available

Source-available integration platform: managed OAuth for 1,000+ APIs, tool calls and an MCP server, syncs and webhooks. Free self-host for auth and proxy.

AutoGen

Free tier available

Microsoft's open-source framework for multi-agent conversations and orchestration. Free to use.

CrewAI

Free tier available

Open-source framework for orchestrating role-playing, collaborating multi-agent 'crews' to automate workflows.

DSPy

Free tier available

Programs prompts instead of writing them. You define signatures and it optimises.

Google ADK

Free tier available

Google's open-source Agent Development Kit: multi-agent systems optimized for Gemini and Vertex AI, model-agnostic via LiteLLM.

LangChain

Free tier available

An open-source framework for building LLM apps and agents, with LangSmith for observability.

Langflow

Free tier available

Visual builder for LangChain-style flows, open source and self-hostable.

LangGraph

Free tier available

Open-source library for building stateful, multi-step agent workflows as graphs, with a managed platform option.

Letta

Free tier available

Agents with persistent memory: the MemGPT research, productised.

LlamaIndex

Free tier available

Open-source data framework for RAG and agents: connect LLMs to your data, with LlamaCloud for managed pipelines.

Mastra

Free tier available

Open-source TypeScript agent framework from the Gatsby team: agents, workflows, memory, and observability in one modern stack.

OpenAI Agents SDK

Free tier available

OpenAI's lightweight, production-ready agent SDK: minimal-boilerplate agents, tools, handoffs, and guardrails.

smolagents

Free tier available

Hugging Face's minimal agent library: agents that write and run Python.

Vercel AI SDK

Free tier available

Open-source TypeScript toolkit for building AI apps and agents with streaming, tool calling, and any model.

Cognee

Free tier available

Open-source (Apache-2.0) knowledge-graph memory for agents: turns documents, code and conversations into a graph you can query. Runs locally without an LLM key.

Mem0

Free tier available

Open-source (Apache-2.0) memory layer for AI agents: remembers users, sessions and agent state across conversations. Self-host or use the managed platform.

Supermemory

Free tier available

Hosted memory and context API for AI apps: user profiles, memory and document search in one call, with connectors for Gmail, Drive, Notion and GitHub.

Zep

Free tier available

Managed context-graph memory for agents, built on the open-source Graphiti engine: tracks how facts change over time. SOC 2 Type II on Enterprise.

E2B

Free tier available

Open-source cloud sandboxes built for AI agents to run code in. The Hobby tier is free with $100 in credits, and Pro is $150/month plus usage.

Vercel Sandbox

Free tier available

Firecracker microVMs on Vercel for running untrusted and AI-generated code. You pay only for active CPU time, not for the time a sandbox spends waiting on the model.

ChatGPT Plus

Free tier available

Consumer subscription to OpenAI's assistant.

Claude Pro

Free tier available

Anthropic's assistant subscription with long-context work.

DeepSeek Chat

Free tier available

Free chat over DeepSeek’s open-weight reasoning models.

Google AI Pro (Gemini)

Free tier available

Gemini 4 Argon, Pro and Flash with Gmail, Docs and up to 5 TB of Google storage bundled in.

Le Chat (Mistral)

Free tier available

Mistral’s assistant from a European AI company, with API credits included on Pro.

Perplexity Pro

Free tier available

AI search that cites its sources.

Qwen Chat

Free tier available

Alibaba’s free assistant over the Qwen model family, strong on multilingual work.

SuperGrok (Grok)

Free tier available

xAI’s assistant with live X data, now sold through the X Subscription alongside X Premium and Cursor.

Cartesia

Free tier available

Low-latency speech models built for live voice agents.

Murf AI

Free tier available

Studio-style AI voiceover: 200+ voices, timing and emphasis controls, and a workspace built for producing narration.

Speechify

Free tier available

Reads documents, PDFs and web pages aloud in natural voices.

CodeRabbit

Free tier available

AI pull-request reviewer that leaves line-level comments, one-click fixes and a summary on every PR.

Greptile

Free tier available

AI code reviewer that indexes your whole codebase, so pull-request comments account for code outside the diff.

Qodo

Free tier available

AI code review and test generation across IDE, pull requests and CLI, from the team behind the open-source PR-Agent.

DeepEval

Free tier available

Open-source, pytest-style framework for unit testing LLM apps and agents, with 50+ metrics. Confident AI is its hosted platform.

Promptfoo

Free tier available

Open-source CLI for testing prompts, agents and RAG apps, with built-in red teaming for jailbreaks, prompt injection and data leaks.

Ragas

Free tier available

Open-source library for evaluating RAG pipelines: faithfulness, context precision and recall, plus synthetic test set generation.

Cloudflare AI Gateway

Free tier available

Free AI gateway on Cloudflare's network: analytics, caching, rate limiting and fallbacks in front of any model provider.

Helicone

Free tier available

Open-source AI gateway and LLM observability: route requests across providers with caching and fallbacks, and log every call.

LiteLLM

Free tier available

Open-source LLM proxy and Python SDK: one OpenAI-style API for 100+ providers, with virtual keys, budgets and fallbacks you host yourself.

Portkey

Free tier available

AI gateway with built-in observability: route to any model with fallbacks, caching and guardrails, then trace every request.

Guardrails AI

Free tier available

Open-source (Apache-2.0) Python framework for validating LLM inputs and outputs: composable validators, structured output and a REST server. Acquired by Harvey in Sep 2026.

Lakera Guard

Free tier available

Real-time API that screens prompts, responses and agent tool use for prompt injection, jailbreaks and data leaks, in under 50 ms. Part of Check Point.

NVIDIA NeMo Guardrails

Free tier available

NVIDIA's open-source (Apache-2.0) toolkit for programmable LLM guardrails: input, output, dialog, retrieval and tool-execution rails.

Brave Search API

Free tier available

Results from Brave's own independent web index, not a Google or Bing reseller, at a flat price per request. An Answers plan adds cited AI answers.

Exa

Free tier available

A search engine built for AI agents, with its own neural index. Returns links plus page text, highlights or summaries in one call, and offers deep search and research agents.

Tavily

Free tier available

A web search API made for LLM apps and agents, with extract, crawl and map endpoints and ready integrations for LangChain, LlamaIndex and most agent frameworks. Part of Nebius.

AI video studio for talking-head content: captions, eye contact correction, dubbing, and fully AI-generated presenters.

HeyGen

Free tier available

AI avatar video and translation for marketing and training.

Turns long videos into short vertical clips automatically, picking the moments most likely to perform and adding captions.

Pika

Free tier available

AI video generator with Pika’s own models plus Veo, Kling and Seedance on every plan, from $10 a month.

Runway

Free tier available

AI video generation and editing studio with Runway’s own Gen-4.5 and Aleph models plus third-party models, billed in monthly credits.

Synthesia

Free tier available

AI presenter videos from a script: 125+ to 240+ avatars by plan, 140 languages, and the tool most L&D teams use instead of filming.

Grammarly

Free tier available

Writing assistant for grammar, tone and clarity everywhere you type.

Budget AI writing assistant with 40+ use-case templates and a genuinely cheap unlimited tier.

AI rewriting and editing assistant that rephrases your own sentences rather than generating new copy.

Amplitude

Free tier available

Product analytics platform for web and mobile with a free plan of 2M events a month.

AppsFlyer

Free tier available

Mobile attribution and analytics platform focused on user acquisition and ROI.

Firebase Analytics

Free tier available

Free mobile-first analytics built into Firebase for app engagement and user behavior tracking.

Google Analytics

Free tier available

Free web analytics platform for tracking user behavior and traffic sources.

Matomo

Free tier available

Google Analytics alternative with full data ownership.

Mixpanel

Free tier available

Advanced event-based analytics that tracks user behavior across mobile and web.

PostHog

Free tier available

Product analytics platform with event tracking, feature flags, and session replay.

Simple Analytics

Free tier available

Cookie-free analytics built around a single readable page.

Umami

Free tier available

Open-source analytics you can self-host or buy hosted.

Kong Konnect

Free tier available

Hosted control plane for the widely used open-source Kong Gateway, with a developer portal, analytics and AI gateway.

Tyk

Free tier available

Open-source Go API gateway with REST, GraphQL and gRPC support. Free to self-host; Cloud and self-managed plans by quote.

Unkey

Free tier available

Open-source API key management and rate limiting: issue, verify and revoke keys with one API call. Free up to 150K verifications.

Zuplo

Free tier available

Edge-deployed API gateway configured in TypeScript, with API keys, rate limiting and a developer portal built in.

Apidog

Free tier available

All-in-one API platform combining design, mocking, testing, and docs: a Postman + Swagger alternative.

Bruno

Free tier available

Open-source, git-native API client: collections stored as files in your repo, offline-first. A fast-growing Postman alternative.

Hoppscotch

Free tier available

Lightweight, open-source browser-based API client for REST, GraphQL, and WebSocket: fast and free.

HTTPie

Free tier available

Human-friendly API client: a famous open-source CLI plus a cross-platform desktop app for REST, GraphQL, and HTTP.

Insomnia

Free tier available

Kong-owned, multi-protocol API client with local, git, or cloud storage per project.

Postman

Free tier available

API platform for building, testing, and documenting APIs.

Scalar

Free tier available

Open-source, OpenAPI-first API platform: a modern REST client plus beautiful auto-generated API references.

Stoplight

Free tier available

Design-first OpenAPI platform: visual API designer, style governance, mock servers, and interactive docs.

Swagger / OpenAPI

Free tier available

The OpenAPI toolset: design, document, and test APIs. Open-source tools free; SwaggerHub for teams.

Thunder Client

Free tier available

Lightweight REST API client built into VS Code and JetBrains: test APIs without leaving your editor.

Auth0

Free tier available

Enterprise-grade authentication and authorization platform with advanced security, SSO, and identity management.

Better Auth

Free tier available

Open-source, TypeScript-first authentication framework: full, self-hosted, and free.

Clerk

Free tier available

Complete authentication and user management platform for modern web applications.

Firebase Authentication

Free tier available

Authentication service by Google Firebase supporting email/password, phone, social logins, and anonymous auth.

NextAuth.js

Free tier available

Open-source authentication solution for Next.js with built-in providers, sessions, and security best practices.

SuperTokens

Free tier available

Open-source authentication solution with flexible cloud and self-hosted options, priced per MAU.

Cerbos

Free tier available

Open-source (Apache-2.0) policy decision point: write RBAC and ABAC rules in YAML, run the stateless PDP next to your app for free, and add Cerbos Hub from $25 a month to manage and roll out policies.

OpenFGA

Free tier available

Open-source (Apache-2.0) relationship-based authorization engine inspired by Google Zanzibar, a CNCF incubating project created by Auth0/Okta. Free to self-host; Auth0 FGA is the managed version.

Permit.io

Free tier available

Hosted authorization with a UI for roles, attributes and relationships (RBAC, ABAC, ReBAC). Free for 1,000 monthly active users and 20 tenants; policy runs in a local decision point built on the open-source OPAL.

SpiceDB

Free tier available

Open-source (Apache-2.0) Zanzibar-style permissions database from AuthZed, used by Red Hat, IBM and GitPod. Free to self-host; AuthZed Cloud is usage-billed from about $2 an hour.

Activepieces

Free tier available

Open-source, self-hostable workflow automation with an MIT-licensed core and native AI steps.

Browser-native automation that scrapes pages and moves data between the web apps already open in your tabs.

Low-code automation that lets you drop into JavaScript mid-workflow, billed by CPU seconds rather than per task.

Make

Free tier available

Visual automation platform (formerly Integromat) with branching, billed in credits, with 1,000 free credits a month.

n8n

Free tier available

Open-source, self-hostable workflow automation with native AI/agent nodes: fair-code and developer-friendly.

Pipedream

Free tier available

Integration API for apps and AI agents (Pipedream Connect); its Workflows product shuts down on March 31, 2027.

Zapier

Free tier available

No-code automation that connects more than 10,000 apps with multi-step "Zaps", billed by monthly task allowance.

Django

Free tier available

Batteries-included Python web framework: ORM, admin, and auth out of the box. Great for data-heavy and AI backends.

Express

Free tier available

Minimal, unopinionated Node.js web framework, now on version 5.

Go (Golang)

Free tier available

Statically typed, compiled language for backend services and infrastructure, with built-in concurrency.

Hono

Free tier available

Small, edge-first web framework for any JS runtime (Cloudflare, Bun, Deno, Node), built on Web Standards.

Java / Spring Boot

Free tier available

Java framework for production services, with embedded servers, auto-configuration and Spring’s security and data libraries.

Laravel

Free tier available

Batteries-included PHP framework with first-party packages for queues, billing, auth and real-time events.

NestJS

Free tier available

Progressive Node.js framework for building scalable, structured server-side apps with TypeScript.

Python / FastAPI

Free tier available

Python API framework built on type hints, with automatic OpenAPI docs; popular for AI and ML backends.

BullMQ

Free tier available

Open-source message queue and job processor on Redis or PostgreSQL, with libraries for Node.js, Python and more.

Celery

Free tier available

The classic distributed task queue for Python: async jobs and scheduled tasks at scale.

Graphile Worker

Free tier available

High-performance job queue for Node.js that runs entirely on your Postgres: no extra infrastructure.

Hatchet

Free tier available

Postgres-backed orchestration engine for background tasks, AI agents, and durable workflows.

Inngest

Free tier available

Durable, event-driven functions and workflows for TypeScript & Python: no queues or workers to manage.

River

Free tier available

Fast, solid background job queue built on Postgres or SQLite with transactional enqueueing, Go-first with clients in other languages.

Sidekiq

Free tier available

Simple, efficient background jobs for Ruby: the standard for Rails apps, backed by Redis.

Temporal

Free tier available

Durable execution platform for mission-critical workflows: code that survives crashes, retries, and restarts.

Trigger.dev

Free tier available

Open-source background jobs and AI workflows for TypeScript: long-running tasks with no timeouts.

Upstash QStash

Free tier available

Serverless message queue and HTTP-based scheduler: background jobs and cron without running any infrastructure.

Apache Superset

Free tier available

Apache-2.0 BI platform with 40+ chart types and a SQL IDE, built for large warehouses. Self-host free, or use Preset's hosted version.

Google Data Studio

Free tier available

Google's free report and dashboard builder, formerly Looker Studio, with native connectors to Google Analytics, Ads, Sheets and BigQuery.

Hex

Free tier available

Collaborative data notebooks that mix SQL, Python and no-code cells, with an AI agent, and publish straight to interactive apps and dashboards.

Metabase

Free tier available

Open-source BI that non-technical people can use: ask questions without SQL, build dashboards and embed them, self-hosted for free.

Arcjet

Free tier available

Bot detection, rate limiting and a WAF as an SDK inside your app, with rules set per route in code. No CAPTCHA for your users to solve.

Cloudflare Turnstile

Free tier available

Free CAPTCHA replacement from Cloudflare: an invisible or one-click check with unlimited challenges, and your site does not need to be on Cloudflare.

Google reCAPTCHA

Free tier available

Google's bot and fraud protection: a risk score for every action, free up to 10,000 assessments a month, then $8 a month up to 100,000.

hCaptcha

Free tier available

Privacy-focused CAPTCHA with a free plan, and a Pro plan that adds a 99.9% passive mode where almost nobody sees a challenge.

Browser Use

Free tier available

Open-source AI browser agent: give it a goal in plain English and it decides the clicks. Self-host free or use Browser Use Cloud.

Hosted headless Chrome you connect Puppeteer or Playwright to over WebSocket, with stealth, proxies and CAPTCHA solving built in.

Steel

Free tier available

Open-source browser API for AI agents with 100 free browser hours a month, then usage-based pricing.

Dragonfly

Free tier available

A multi-threaded, Redis-compatible in-memory store that runs far more ops per node. Free to self-host; Cloud from $36/month.

Redis Cloud

Free tier available

The managed service from Redis itself: a 30 MB free database, Essentials from $5/month and Pro with active-active replication.

Upstash Redis

Free tier available

Serverless Redis billed per command, with an HTTP API that works from edge functions. Free up to 500K commands a month.

Debezium

Free tier available

Open-source change data capture: streams every insert, update and delete from your database logs as events. Apache 2.0.

Estuary Flow

Free tier available

Streaming CDC pipelines with sub-second latency, priced per GB moved plus a flat fee per connector.

Striim

Free tier available

Real-time CDC and stream processing with SQL, with a free Developer tier up to 25 million events a month.

Bunny CDN

Free tier available

Pay-as-you-go CDN from $0.01/GB in Europe and North America, with a $1 monthly minimum and no request fees.

Cloudflare CDN

Free tier available

The default CDN for most of the web: a free plan with unmetered bandwidth, plus DNS, DDoS protection and a WAF on the same network.

Fastly

Free tier available

Programmable edge cloud with instant cache purges and Compute at the edge, used by large publishers and commerce sites.

Hightouch

Free tier available

Reverse ETL: sync the models in your warehouse back out to Salesforce, HubSpot, ad platforms and support tools.

RudderStack

Free tier available

Warehouse-first customer data pipeline: collect events once, land them in your own warehouse, then fan out to 200+ destinations.

Snowplow

Free tier available

Behavioural event pipeline that validates every event against a schema and lands it in your warehouse, lake or stream.

Beamer

Free tier available

Changelog and in-app announcement widget with segmentation, push notifications and engagement analytics. Free up to 1,000 MAU.

Headway

Free tier available

Simple changelog page and in-app widget with a free plan for unlimited changelogs. Pro is $29/month flat.

Argo CD

Free tier available

GitOps continuous delivery for Kubernetes: the cluster reconciles itself to whatever the manifests in Git say.

Buildkite

Free tier available

Scalable CI/CD that runs pipelines on your own infrastructure: fast, secure, with a free tier.

CircleCI

Free tier available

Cloud-native CI/CD platform for fast, reliable software delivery.

GitHub Actions

Free tier available

CI/CD and automation platform built into GitHub repositories.

GitLab CI/CD

Free tier available

Built-in CI/CD inside GitLab: pipelines as code with a generous free tier of compute minutes.

Jenkins

Free tier available

The veteran open-source automation server: endlessly extensible CI/CD with 2,300+ plugins. Free to self-host.

Contentful

Free tier available

Enterprise headless CMS for managing content across multiple channels.

Directus

Free tier available

Open-source data platform that wraps any SQL database with instant REST/GraphQL APIs and an admin app.

Payload CMS

Free tier available

TypeScript-native, open-source headless CMS that installs directly into your Next.js app: the CMS that made the biggest splash in 2026.

Sanity

Free tier available

Headless CMS with real-time collaboration and customizable content studio.

Storyblok

Free tier available

Headless CMS with the best visual editor on the market: non-technical teams edit pages in a live preview.

Strapi

Free tier available

Open-source headless CMS that's 100% JavaScript and fully customizable.

Amazon Q Developer

Free tier available

AWS coding assistant with agentic chat, CLI and Java modernisation.

Cursor

Free tier available

AI code editor with agents and cloud agents, now sold through the X Subscription with a usage pool shared with Grok.

Devin Desktop (formerly Windsurf)

Free tier available

AI code editor, now renamed Devin Desktop: local and cloud agents with models from several labs.

GitHub Copilot

Free tier available

AI-powered coding assistant that helps you write, review, and understand code faster directly in your IDE.

Google Antigravity

Free tier available

AI-powered agent-first IDE from Google with autonomous AI agents, generous free tier, and multi-model support.

OpenAI Codex

Free tier available

OpenAI’s agentic coding tool: a terminal CLI, IDE extension and cloud agent on GPT-6 and GPT-6.1 models.

Discord

Free tier available

Voice, video, and text communication platform popular with developer communities.

Google Meet

Free tier available

Browser-based video meetings integrated with Google Workspace: no install, free to start.

Mattermost

Free tier available

Open-source, self-hostable team messaging: a Slack alternative for security- and privacy-conscious teams.

Microsoft Teams

Free tier available

Team chat, video meetings, and collaboration deeply integrated with Microsoft 365. Free tier available.

Rocket.Chat

Free tier available

Open-source, self-hostable team communication platform for security- and data-sovereignty-focused teams.

Slack

Free tier available

Business messaging platform for team communication and collaboration.

Zoom

Free tier available

The ubiquitous video meetings platform: reliable HD video, webinars, and a free tier (40-min meetings).

Zulip

Free tier available

Open-source team chat with a unique topic-threading model: great for async, focused discussions.

Chatwoot

Free tier available

Open-source customer engagement suite you can self-host.

Crisp

Free tier available

Shared inbox and chat widget at a flat team price.

Help Scout

Free tier available

Email-first support that keeps conversations feeling personal.

Tidio

Free tier available

Live chat and AI bots aimed at small ecommerce teams.

Airbyte

Free tier available

Open-source ELT with 600+ connectors: self-host it for free, or buy the managed cloud when you would rather not.

Fivetran

Free tier available

Managed ELT connectors that keep a warehouse in sync with every SaaS tool and database you run, priced per row changed.

Meltano

Free tier available

Open-source, CLI-first ELT built on the Singer taps and targets: your pipeline as code, running wherever you already deploy.

Apache Airflow

Free tier available

The Apache project for writing, scheduling and monitoring data workflows as Python code. Free and self-hosted.

Dagster

Free tier available

Asset-based data orchestrator: you declare the tables and models you want, Dagster keeps them fresh. Open source, plus Dagster+ from $10 a month.

Kestra

Free tier available

Declarative orchestration: workflows written in YAML, any language inside the tasks. Apache 2.0 open source with an Enterprise edition.

Prefect

Free tier available

Python-native workflow orchestration: decorate functions to make them flows. Apache 2.0 engine, free Hobby cloud tier.

Google BigQuery

Free tier available

Serverless Google Cloud warehouse: $6.25 per TiB scanned on demand, with the first 1 TiB of queries and 10 GiB of storage free each month.

MotherDuck

Free tier available

Serverless warehouse built on DuckDB. Free Lite plan with 10 GB storage; Business from $250 a month plus usage.

Appwrite

Free tier available

Open-source backend-as-a-service providing databases, authentication, storage, serverless functions, and real-time APIs.

Convex

Free tier available

Reactive backend-as-a-service with a built-in database, real-time queries, serverless functions, and AI-powered app generation.

MongoDB Atlas

Free tier available

Fully managed cloud NoSQL database with flexible scaling, global distribution, and strong developer tooling.

Neon

Free tier available

Serverless PostgreSQL with autoscaling, branching, and usage-based pricing.

Redis

Free tier available

In-memory data structure store used as a cache, session store, real-time queue, and message broker.

Supabase

Free tier available

Open-source Firebase alternative built on PostgreSQL with auth, storage, and real-time features.

Turso

Free tier available

Edge SQLite (libSQL) database built for the database-per-tenant pattern, with a generous free tier.

Affinity

Free tier available

Professional vector, photo and layout tools in one app: free since Canva took it on.

Photopea

Free tier available

Photoshop in a browser tab, ad-supported and free.

Cloudflare Tunnel

Free tier available

Free outbound-only tunnel from your server or laptop to Cloudflare, so a service gets a public hostname without opening a port.

ngrok

Free tier available

The best-known way to put a localhost server on a public URL, now a full ingress platform with traffic policy, auth and custom domains.

Pinggy

Free tier available

Localhost tunnels over a single SSH command, with nothing to install. The cheapest paid plan in the category.

zrok

Free tier available

Open-source (Apache-2.0) sharing and tunnelling built on OpenZiti zero trust. Use the free hosted service or self-host with no limits.

Docling

Free tier available

MIT-licensed document parser from IBM Research, hosted by the LF AI & Data Foundation. Runs locally, reads PDF, Office, HTML, images and audio, and exports Markdown or JSON with tables and reading order intact.

LlamaParse

Free tier available

LlamaIndex's hosted document parser for RAG and agents. Four parse tiers from 1 to 45 credits a page, 10,000 free credits a month, and Extract, Classify and Split APIs on the same credits.

Unstructured

Free tier available

ETL for unstructured data: an Apache-2.0 Python library plus a hosted platform at $15 per 1,000 pages after 10,000 free, with connectors that move parsed, chunked and embedded content into your vector store.

Docusaurus

Free tier available

Meta's open-source React docs generator: free forever, versioned, i18n-ready, and hosted anywhere static files go.

GitBook

Free tier available

Block-based docs with GitHub sync: a WYSIWYG editor non-engineers can use that still round-trips to Markdown in your repo.

Mintlify

Free tier available

Modern docs platform for API-first products: MDX in your repo, an API playground, AI search and an MCP server generated for you.

The long-standing host for Sphinx and MkDocs documentation: builds from your repo on every commit, with versioning and full-text search built in.

ReadMe

Free tier available

API documentation hubs with personalised keys, real request logs and metrics on which endpoints developers actually call.

iLovePDF

Free tier available

Online PDF toolkit: convert, compress, merge, split, edit and sign PDFs in the browser, with a free plan.

PandaDoc

Free tier available

All-in-one document automation: build proposals, quotes, and contracts with templates, pricing tables, e-signatures, and payments.

PDF24 Tools

Free tier available

Completely free PDF toolkit with 30+ tools online and an offline desktop app: no sign-up required.

Smallpdf

Free tier available

Popular online PDF suite: convert, compress, merge, edit, sign, and e-sign documents in the browser.

Stirling PDF

Free tier available

Open-source PDF toolkit with 60+ tools: run it on the web, as a desktop app or self-hosted so files stay on your server.

Medusa

Free tier available

Open-source headless commerce engine for Node.

Saleor

Free tier available

Open-source, GraphQL-first headless commerce platform.

WooCommerce

Free tier available

The open-source store plugin for WordPress.

Kickbox

Free tier available

Developer-friendly email verification API with a Sendex quality score, pay-as-you-go credits and no subscription.

Reacher

Free tier available

Open-source (MIT) email verification: checks syntax, MX records and the mailbox over SMTP without sending an email. Self-host or use the hosted API.

ZeroBounce

Free tier available

Email list validation and scoring: catches invalid, catch-all, spam-trap and abuse addresses before you send. Pay-as-you-go or monthly credits.

Amazon SES

Free tier available

Pay-as-you-go AWS email at $0.10 per 1,000 emails, with dedicated IPs and deliverability tools as paid add-ons.

Mailgun

Free tier available

Developer-focused transactional email API with strong deliverability and detailed analytics.

Postmark

Free tier available

Transactional email service focused on speed and reliability.

Resend

Free tier available

Developer-first transactional email API built for modern applications.

SendGrid

Free tier available

Scalable email delivery platform for transactional and marketing emails.

Documenso

Free tier available

Open-source Docusign alternative (AGPL-3.0). Free hosted plan for 5 documents a month, unlimited documents from $25 a month, or self-host it for free.

DocuSeal

Free tier available

Open-source document signing (AGPL-3.0) with a free self-hosted edition, a $20 per user cloud plan, and an embeddable signing API at $0.20 per completed document.

CloudAMQP

Free tier available

Managed RabbitMQ (and LavinMQ) with a free shared plan and dedicated brokers from $50/month.

Confluent Cloud

Free tier available

Managed Apache Kafka from the team that created it, with Flink stream processing and 120+ managed connectors.

Redpanda

Free tier available

Kafka-compatible streaming in a single C++ binary with no ZooKeeper or JVM. Free community edition, Serverless and BYOC cloud.

Synadia Cloud

Free tier available

Managed NATS from its creators: pub/sub, JetStream persistence and key-value in one lightweight system. Free Personal plan.

ConfigCat

Free tier available

Straightforward hosted feature flags with a free tier that never expires and flat, published pricing.

Flagsmith

Free tier available

Open-source feature flags you can self-host, with hosted plans priced on API requests rather than seats.

GrowthBook

Free tier available

Warehouse-native flags and experiments: the stats run on your own data, and the whole platform is open source.

LaunchDarkly

Free tier available

The enterprise standard for feature flags: targeting rules, percentage rollouts and instant kill switches across 30 SDKs.

Statsig

Free tier available

Flags, experiments and product analytics in one tool, with the statistics engine that made it worth switching.

Unleash

Free tier available

Open-source feature flags with a privacy-first architecture: flag evaluation happens in your SDK, never on the vendor's servers.

Canny

Free tier available

Feature request boards with voting, roadmaps and changelogs. It is free for 25 tracked users, and Pro is $79/month billed yearly.

Featurebase

Free tier available

Feedback boards, roadmaps and changelogs bundled with an AI support inbox and help centre, priced per seat from $29.

Productboard

Free tier available

A product management platform that turns customer feedback into prioritised roadmaps, priced per maker from $19/month.

Accounts payable for small businesses: pay vendors by bank transfer free, or by card for a fee, with QuickBooks and Xero sync.

Wave

Free tier available

Free invoicing and bookkeeping for freelancers and very small businesses: Wave makes its money on payments, not software.

Zoho Books

Free tier available

Full double-entry accounting at a fraction of QuickBooks: free under a revenue threshold, $20/month after.

Angular

Free tier available

A full-featured, opinionated framework for building scalable web applications.

Astro

Free tier available

Content-focused web framework with zero-JS by default and 'islands architecture': ideal for fast marketing and content sites.

Nuxt

Free tier available

The Vue meta-framework: SSR, file routing, and auto-imports for production Vue apps.

React

Free tier available

A declarative, component-based JavaScript library for building user interfaces.

Remix

Free tier available

Full-stack web framework built on Web APIs: Remix 3 is a new framework with no React dependency, under active development.

SolidJS

Free tier available

Reactive UI library with fine-grained reactivity and no virtual DOM, with a React-like JSX API.

SvelteKit

Free tier available

Official Svelte meta-framework with file-based routing, SSR and small compiled bundles.

Vue

Free tier available

A progressive JavaScript framework for building modern user interfaces.

Base44

Free tier available

AI-powered app builder for creating full-stack applications with messaging, integrations, and backend logic.

Bolt.new

Free tier available

AI-powered full-stack app builder that generates, hosts, and deploys applications from natural language prompts.

Bubble

Free tier available

No-code platform to build, launch, and scale production-ready web and mobile applications with AI.

ChatGPT Sites (OpenAI)

Free tier available

Prompt-to-site hosting built into ChatGPT and Codex: describe a website or internal tool and OpenAI builds, hosts and shares it.

Dyad

Free tier available

Flexible, local, open-source AI app builder with zero lock-in.

Lovable

Free tier available

Collaborative AI-powered app builder for teams to design, build, and publish projects together in real time.

Next.js

Free tier available

A full-stack React framework for building production-grade web applications.

Replit

Free tier available

Cloud-based development platform to build, run, and deploy applications with AI-powered agents.

Trickle

Free tier available

AI-powered website and web app builder with built-in database, hosting, and credit-based AI usage.

v0 by Vercel

Free tier available

AI-powered UI and app generation tool by Vercel for building, iterating, and deploying apps faster.

Cloudflare Pages & Workers

Free tier available

Edge-first hosting platform for static sites, serverless functions, and global compute.

DigitalOcean App Platform

Free tier available

Fully managed PaaS to build, deploy, and scale applications directly from Git or container images.

Microsoft Azure

Free tier available

Microsoft’s enterprise cloud: App Service, VMs, containers, and a free tier, deeply tied to the Microsoft ecosystem.

Netlify

Free tier available

Frontend-focused hosting platform with global CDN, serverless functions, and Git-based CI/CD.

Oracle Cloud (OCI)

Free tier available

Known for its Always Free tier: ARM Ampere VMs you can run indefinitely at $0.

Railway

Free tier available

Developer-focused cloud platform to deploy apps, databases, and services with usage-based pricing.

Render

Free tier available

Unified cloud platform to deploy and scale full-stack applications, APIs, background workers, and managed datastores.

Vercel

Free tier available

Frontend-first cloud platform for deploying and scaling web applications with global edge infrastructure.

IntelliJ IDEA

Free tier available

JetBrains’ flagship IDE, now one unified download. It is free for commercial use, and Ultimate costs $719 per user per year for companies.

Neovim

Free tier available

The modern fork of Vim, with Lua configuration, a built-in LSP client and Tree-sitter. It is free and runs in any terminal.

Visual Studio Code

Free tier available

The most-used code editor in the world. It is free, runs on every desktop OS, and is the base that Cursor, Windsurf and most AI editors fork.

Zed

Free tier available

A GPU-accelerated editor written in Rust by the creators of Atom. It is free and open source, with $10/month Pro for hosted AI.

Cloudinary

Free tier available

Upload, transform and deliver images and video through URL parameters and a global CDN. Free plan with 25 credits a month.

ImageKit

Free tier available

Real-time image and video optimisation with a CDN, free up to 20 GB of bandwidth, then from $9/month.

imgix

Free tier available

URL-based image processing and delivery that works on top of your own storage. Plans from $25/month.

Uploadcare

Free tier available

File uploading, storage, image processing and CDN delivery in one API, with a ready-made upload widget.

incident.io

Free tier available

Slack-native incident response with on-call, status pages and post-mortems in one product. Team is $19 per user, plus $10 for on-call.

PagerDuty

Free tier available

The on-call and alerting standard: schedules, escalations and phone, SMS and push paging. It is free for up to 5 users, then $25 per user.

AWS CloudFormation

Free tier available

AWS's native infrastructure as code. It is free for AWS resources and has no state file to manage, but it only covers AWS.

OpenTofu

Free tier available

The open-source fork of Terraform under the Linux Foundation. It is a drop-in replacement that has since added features Terraform lacks, such as built-in state encryption.

Pulumi

Free tier available

Infrastructure as code in TypeScript, Python, Go, C#, Java or YAML. The engine is open source, and Pulumi Cloud starts at $40/month for teams.

Terraform

Free tier available

The default language for infrastructure as code. The CLI is free. HCP Terraform, the managed runner, bills per managed resource, and the unlimited free plan ended in March 2026.

Appsmith

Free tier available

Open-source internal tool builder: the Retool model, self-hostable, at $15 per user on cloud.

Budibase

Free tier available

Low-code internal apps with a built-in database, automations and flat monthly pricing rather than per-seat billing.

Retool

Free tier available

Drag-and-drop admin panels and internal apps wired straight to your database and APIs, priced per builder.

ToolJet

Free tier available

Open-source internal tool builder with unlimited builders on paid plans: the seat maths that suits engineering-heavy teams.

Windmill

Free tier available

Open-source developer platform that turns scripts in Python, TypeScript, Go or Bash into internal UIs, workflows and cron jobs.

Anytype

Free tier available

Source-available, end-to-end encrypted, local-first workspace: a private alternative to Notion and Obsidian.

Confluence

Free tier available

Atlassian team wiki, and the default when the rest of the stack is already Jira.

Logseq

Free tier available

Free, open-source (AGPL-3.0), local-first outliner for networked notes and personal knowledge management.

Obsidian

Free tier available

Local-first Markdown knowledge base with backlinks and graph view: free without limits, including for work.

Outline

Free tier available

Fast, source-available (BSL 1.1) team wiki you can host yourself or buy hosted at a flat price by team size.

Slab

Free tier available

Team wiki that stays readable: clean editor, strong search across your other tools.

Databricks

Free tier available

Data and AI platform built on Spark and Delta Lake, billed per second of usage with no up-front cost. Free Edition for learning.

Dremio

Free tier available

Lakehouse query platform for Apache Iceberg on your own object storage. Cloud at $0.20 per DCU, with a free Community Edition.

Albert

Free tier available

Free, open-source keyboard launcher for Linux: fuzzy search apps, files, calculations, and more.

Alfred

Free tier available

The classic macOS launcher and productivity app: search, clipboard history, and workflows.

Flow Launcher

Free tier available

Free, open-source quick launcher for Windows: search apps, files, and the web with a plugin ecosystem.

Raycast

Free tier available

Blazing-fast launcher and productivity hub for macOS (and Windows) with extensions, snippets, and AI.

Bitly

Free tier available

The best-known link shortener, with branded links, QR codes and a link-in-bio page. Free for 5 links a month.

Dub

Free tier available

Open-source link management with branded short links, click and conversion analytics, and a built-in affiliate program.

Rebrandly

Free tier available

Branded short links on your own domain, with QR codes and analytics. From $8/month billed annually.

Short.io

Free tier available

Branded short links with a generous free plan of 1,000 links, and unlimited links from $18/month.

Braintrust

Free tier available

Eval-first AI observability with unlimited users on every plan. It is priced on data processed and scores run, not seats.

Langfuse

Free tier available

Open-source LLM tracing, evals and prompt management: MIT-licensed, self-hostable, and $29/month in the cloud with unlimited users.

LangSmith

Free tier available

LangChain's tracing and evaluation platform, the deepest fit for LangGraph agents. It is priced per seat plus per trace.

OpenTelemetry

Free tier available

The vendor-neutral standard for traces, metrics and logs, with GenAI conventions that describe LLM calls, agents and MCP in one shared schema.

Cohere

Free tier available

Enterprise LLM platform built for RAG and search: Command models plus dedicated Embed and Rerank models.

Fireworks AI

Free tier available

Ultra-low-latency serverless inference and fine-tuning for open models: sub-100ms for common models.

Google Gemini API

Free tier available

Google's Gemini API: multimodal AI models with long context windows and competitive pricing for high-volume applications.

Groq

Free tier available

Ultra-fast LLM inference API powered by custom LPUs: sub-second responses with a generous free tier.

Mistral AI API

Free tier available

European open-weight LLM API with strong coding models, function calling, and a free tier via La Plateforme.

NVIDIA NIM

Free tier available

NVIDIA's inference layer: a free-to-prototype catalog of 40+ optimized open-weight LLMs with an OpenAI-compatible API.

OpenRouter

Free tier available

One API for hundreds of LLMs (Claude, GPT, Llama, DeepSeek…) with automatic routing, fallbacks, and free models.

Together AI

Free tier available

Serverless inference and fine-tuning for 200+ open-source models: the price leader at scale, with $25 free credits.

Translation management from the i18next team, with a CDN that serves translations to your app at runtime.

Straightforward translation management priced by string count, with unlimited projects and contributors on every tier.

Tolgee

Free tier available

Open-source localisation platform whose in-context editor lets you translate strings by alt-clicking them in your running app.

Weblate

Free tier available

Copyleft web-based translation with tight Git integration: free hosting for libre projects, self-hosted for everyone else.

OpenStreetMap-powered geocoding, routing, isolines and places APIs with straightforward daily-credit tiers.

Geocoding, maps and routing APIs at low flat rates, built on OpenStreetMap with generous daily request limits.

Developer-first mapping platform with fully customisable vector map styles, navigation and search, priced per map load.

OpenStreetMap-based map tiles, geocoding and hosting with a genuinely cheap flat tier and self-hosting via MapTiler Server.

Open-source map stack that packs the whole planet into a single file you host yourself: no tile server, no per-request billing.

MCP Inspector

Free tier available

The official open-source debugger for MCP servers: list tools, call them by hand and read the raw JSON-RPC traffic.

MCP Playground Online

Free tier available

MCP inspector for the web and desktop: test servers, run evals, scan against the OWASP MCP Top 10, and test local stdio servers in the Mac and Windows app.

Smithery

Free tier available

The largest MCP server registry, plus hosting and managed OAuth so agents can connect to servers without running them.

Fireflies.ai

Free tier available

AI notetaker that records, transcribes and summarises calls, then pushes notes and action items into your CRM and project tools.

Granola

Free tier available

Bot-free AI notepad: it listens to your device audio, and you jot rough notes that AI turns into a clean summary. No bot joins the call.

Meetily

Free tier available

Open-source, privacy-first AI meeting notes. Transcribes locally with Whisper or Parakeet and summarises without sending audio to the cloud. Free Community Edition.

Otter.ai

Free tier available

AI meeting assistant that joins Zoom, Meet and Teams to transcribe live, summarise and pull out action items. Free for 300 minutes a month.

Expo (React Native)

Free tier available

The fastest way to build cross-platform iOS and Android apps with React Native.

Flutter

Free tier available

Google's UI toolkit for building beautiful, natively compiled apps from a single Dart codebase.

Ionic

Free tier available

Build cross-platform mobile and web apps with web tech (Angular/React/Vue) and one shared codebase.

Kotlin Multiplatform

Free tier available

Share business logic (and increasingly UI via Compose) across iOS, Android, web, and desktop from one Kotlin codebase.

React Native (bare)

Free tier available

Meta's framework for building native mobile apps using JavaScript/TypeScript without Expo.

Tauri

Free tier available

Build tiny, secure cross-platform desktop and mobile apps with a Rust core and any web frontend.

Axiom

Free tier available

Serverless log management and analytics built for huge volumes at low cost: 500GB/month free.

Better Stack

Free tier available

Modern, developer-friendly observability: logs, metrics, uptime monitoring, and incident management in one clean UI.

Datadog

Free tier available

Enterprise-grade, full-stack observability: infrastructure, APM, logs, and 800+ integrations. Usage-based.

Grafana Cloud

Free tier available

Managed Grafana, Prometheus, Loki, and Tempo: a free tier for metrics, logs, and traces.

Highlight.io

Free tier available

Open-source, full-stack monitoring with session replay, error tracking, and logs in one platform.

LogRocket

Free tier available

Session replay and error tracking to understand user experience and debug issues.

Sentry

Free tier available

Application monitoring and error tracking platform for developers.

Beehiiv

Free tier available

Newsletter platform built for growth, with built-in monetization, referral programs, and ad network.

Ghost

Free tier available

Open-source publishing platform for blogs, newsletters, and memberships, with native subscriptions.

Kit (ConvertKit)

Free tier available

Email platform for creators, with automations, paid newsletters, and a free plan up to 10,000 subscribers.

Loops

Free tier available

Modern email platform for SaaS: transactional + marketing emails with a clean API and great deliverability.

Realtime messaging platform with guaranteed ordering, delivery and history: pub/sub, presence and push, on a global edge network.

Notification API and template studio that routes one send across email, SMS, push and chat, priced per send.

Notification infrastructure as a service: cross-channel workflows, batching, user preferences and an in-app feed, without running any of it.

Embeddable notification inbox with ready-made UI components for React, Vue, Ember and iOS, backed by a delivery API.

Open-source notification infrastructure: one workflow drives email, SMS, push, chat and a drop-in in-app inbox.

Push, in-app, email and SMS messaging platform aimed at mobile and web audiences, with segmentation and campaign tooling.

Hosted WebSocket pub/sub for realtime features (live updates, presence and in-app alerts) priced by connections and daily messages.

Cloudflare R2

Free tier available

S3-compatible object storage with no egress fees: $0.015 per GB-month, and 10 GB free each month.

Google Cloud Storage

Free tier available

Google Cloud’s object storage with Standard, Nearline, Coldline and Archive classes and an Always Free tier.

Pendo

Free tier available

Product analytics and in-app guides on one platform, free up to 500 MAUs, with paid plans by quote.

Fazier

Free tier available

Free daily product discovery platform: submit your product to be featured alongside other new launches and get community upvotes.

Hacker News

Free tier available

A social news platform focused on startups, technology, and entrepreneurship.

PeerPush

Free tier available

A launch and discovery platform where builders get peer-powered promotion, real feedback, and sustained visibility beyond launch day.

Product Hunt

Free tier available

The go-to platform to launch and discover new tech products.

SaaSworthy

Free tier available

A B2B software discovery and comparison platform focused on SaaS buyers.

SideProjectors

Free tier available

A marketplace to sell, buy, and promote side projects and digital products.

Software Finder

Free tier available

A software discovery and comparison platform that helps businesses find, evaluate, and compare software across a wide range of categories.

TinyLaunch

Free tier available

Weekly product launch competition for indie makers: top 3 products win a badge and a high-authority dofollow backlink (DR 62).

Uneed

Free tier available

A curated launch platform to showcase new products and gain traffic with SEO backlinks.

Airtable

Free tier available

Spreadsheet-database hybrid with app building on top.

Asana

Free tier available

Work management platform for teams to plan, organize, and execute projects.

ClickUp

Free tier available

All-in-one productivity platform replacing multiple apps with one unified workspace.

Jira

Free tier available

Issue tracking and project management for software teams, with Scrum and Kanban boards and configurable workflows.

Linear

Free tier available

Fast issue tracking and project management tool built for modern software teams.

Monday.com

Free tier available

Visual work management across boards and automations.

Notion

Free tier available

All-in-one workspace for notes, docs, wikis, and project management with databases.

Trello

Free tier available

Visual Kanban-style project management tool for organizing tasks and workflows.

Presto

Free tier available

Distributed SQL engine governed by the Presto Foundation under the Linux Foundation, with a C++ native worker. Apache 2.0.

Starburst

Free tier available

Managed and enterprise Trino from Trino’s creators. Galaxy has a free tier with 3 clusters; paid tiers from $0.50 a credit.

Trino

Free tier available

Open-source distributed SQL engine that queries S3, Hadoop, Cassandra, MySQL and more in place, and joins across them. Apache 2.0.

Apache Druid

Free tier available

Open-source real-time analytics database for sub-second queries on streaming and batch data at high concurrency.

Apache Pinot

Free tier available

Open-source OLAP database for user-facing real-time analytics, built for fresh data at high query concurrency.

ClickHouse

Free tier available

Column-oriented analytics database for fast queries on billions of rows. Apache 2.0, plus ClickHouse Cloud with $300 of trial credits.

Tinybird

Free tier available

Managed ClickHouse that turns SQL queries into real-time API endpoints. Free plan; Developer from $49 a month.

Apollo.io

Free tier available

B2B sales intelligence and engagement platform with 240M+ contacts, prospecting, and outreach automation.

Brevo

Free tier available

Email & SMS marketing platform with transactional email, automation, and CRM: all at low cost.

Clay

Free tier available

Data enrichment and outbound research run as a spreadsheet.

HubSpot CRM

Free tier available

All-in-one CRM platform covering marketing, sales, and customer service with a generous free tier.

Klaviyo

Free tier available

Ecommerce marketing automation built on customer data.

Mailchimp

Free tier available

Email marketing platform with drag-and-drop campaigns, automations, and audience insights.

Omnisend

Free tier available

Email and SMS marketing aimed squarely at ecommerce.

Cal.com

Free tier available

Scheduling platform with a free plan for individuals and per-user team plans; a Calendly alternative with routing, embeds and an API.

Calendly

Free tier available

Scheduling tool for booking links: share a link, let people book, and sync with your calendar automatically.

Reclaim.ai

Free tier available

Defends focus time on your calendar and schedules habits and tasks around meetings.

TidyCal

Free tier available

Affordable Calendly alternative with a solid free tier and a low-cost lifetime deal.

Algolia

Free tier available

Hosted search API for fast, relevant search experiences.

Elasticsearch

Free tier available

The most widely used search and analytics engine: full-text search, vectors, and observability at scale.

Meilisearch

Free tier available

Open-source search engine with instant, typo-tolerant search.

OpenSearch

Free tier available

Apache-2.0 open-source search and analytics suite (Elasticsearch fork) backed by AWS: fully free to self-host.

Orama

Free tier available

Tiny, fast open-source full-text and vector search engine that runs anywhere: browser, edge, or server.

Typesense

Free tier available

Fast, typo-tolerant open-source search engine alternative to Algolia.

Doppler

Free tier available

Hosted secrets manager that syncs environment variables to every environment, CI system and cloud. Free for up to 3 users; Team is $21 per user per month with SSO, rotation and change requests.

HashiCorp Vault

Free tier available

The long-standing standard for secrets, dynamic credentials and encryption as a service. Free Community Edition (BSL 1.1) to self-host, managed HCP Vault Dedicated from $0.62 an hour, Enterprise by quote.

Infisical

Free tier available

Open-source (MIT) secrets manager with a free self-hosted core, a free cloud tier for 5 identities, and Pro from $20 per identity per month. Also covers certificates and privileged access.

MarketMuse

Free tier available

Content planning and topic authority modelling.

OpenSEO

Free tier available

Open-source, MCP-native SEO suite you can self-host or run pay-as-you-go.

Screaming Frog

Free tier available

Desktop crawler that remains the standard for technical SEO audits.

Semrush

Free tier available

All-in-one SEO, PPC and competitive research platform.

Fullstory

Free tier available

Enterprise digital experience analytics: pixel-accurate replay, auto-captured events and funnels. It is quote-based, with a free tier.

Hotjar

Free tier available

The best-known heatmap and session recording tool, now sold as part of Contentsquare. Growth starts at $49/month for 7,000 sessions.

Microsoft Clarity

Free tier available

Free session recordings and heatmaps from Microsoft, with no traffic limits, no sampling and no paid tier.

Mouseflow

Free tier available

Session replay, heatmaps, funnels and form analytics on straightforward published tiers, with unlimited seats from $25/month.

Autoadify

Free tier available

Social media management with AI Workflows, an AI Agent across 20 tools and an AI Studio of 70+ text, image, video and audio models, publishing to 10+ platforms.

Buffer

Free tier available

Simple social scheduling across every major network.

Metricool

Free tier available

Scheduling, analytics and competitor tracking for many brands at once, with a free plan and an AI assistant.

Coalesce

Free tier available

Visual, column-aware transformation for Snowflake, Databricks, BigQuery and Fabric, with a free single-user plan.

Dataform

Free tier available

Google Cloud’s SQL workflow tool for BigQuery. Dataform itself is free; you pay for the BigQuery queries it runs.

dbt

Free tier available

SQL transformations with version control, tests and lineage: the layer that turns raw warehouse tables into models you trust.

SQLMesh

Free tier available

Open-source SQL transformation framework with virtual data environments, so dev copies don’t rebuild your warehouse. Apache 2.0.

Atlassian Statuspage

Free tier available

The status page most large SaaS companies use: incident communication and subscriber notifications. It does no monitoring of its own.

Instatus

Free tier available

A fast, affordable Statuspage alternative with monitoring included. It costs $20/month for a custom domain, but the next tier up is $300.

Uptime Kuma

Free tier available

Self-hosted uptime monitoring and status pages. It is MIT-licensed, has about 92k GitHub stars and supports 90+ notification channels.

UptimeRobot

Free tier available

Uptime monitoring with status pages built in. The free plan has 50 monitors, and paid plans add faster checks from $10/month.

Zero-knowledge encrypted cloud storage from Germany, with stackable plans and unusually cheap per-terabyte pricing.

European cloud storage that also connects your existing Dropbox, Google Drive and OneDrive accounts into one searchable place.

Nextcloud

Free tier available

Self-hosted file sync and share: Dropbox, Google Docs and Calendar on your own server, with no per-user licence.

Apache Flink

Free tier available

Open-source engine for stateful stream processing with exactly-once state, event time and Flink SQL. Apache 2.0.

Kafka Streams

Free tier available

Java and Scala library for stream processing on Kafka topics. No separate cluster: it runs inside your own app. Apache 2.0.

Materialize

Free tier available

SQL engine that keeps query results current as source data changes, using incremental computation. Cloud at $1.50 per compute credit.

RisingWave

Free tier available

Streaming database you query with Postgres-compatible SQL, with native Apache Iceberg support. Apache 2.0, cloud from $0.227 per RWU-hour.

Ghostty

Free tier available

A fast, GPU-accelerated terminal with a fully native UI, from HashiCorp co-founder Mitchell Hashimoto. It is free and MIT-licensed.

iTerm2

Free tier available

The long-standing default terminal on macOS for developers. It is free, GPL-licensed and has deep tmux integration.

Warp

Free tier available

A terminal rebuilt around blocks and AI agents. The terminal is free on every plan, and paid plans buy AI credits from $20/month.

Windows Terminal

Free tier available

Microsoft's open-source, tabbed terminal for PowerShell, Command Prompt and WSL. It is the default on Windows 11 and free.

Checkly

Free tier available

Code-first synthetic monitoring and E2E checks using Playwright: monitoring-as-code with a free tier.

Cypress

Free tier available

JavaScript end-to-end testing framework with time-travel debugging.

Jest

Free tier available

Zero-config JavaScript testing framework with snapshots, mocking and a large ecosystem.

Playwright

Free tier available

Cross-browser end-to-end testing framework by Microsoft.

TestMu AI (LambdaTest)

Free tier available

Cross-browser and real-device test cloud, cheaper per parallel than the incumbents.

Vitest

Free tier available

Vite-native unit test framework with a Jest-compatible API for JavaScript and TypeScript projects.

Figma

Free tier available

Collaborative ui-ux design platform for designing, prototyping, and handing off products in real time.

Penpot

Free tier available

Open-source design and prototyping platform with collaborative ui-ux tooling for teams.

Uizard

Free tier available

AI-powered ui-ux design tool that turns sketches and prompts into interactive screens and prototypes.

Flexprice

Free tier available

Open-source billing for AI and API products: usage, credits and hybrid pricing with published prices and a free cloud tier.

Lago

Free tier available

Open-source usage-based billing: meter events, price them with any model, and generate invoices. Self-host free or use Lago Cloud.

Chroma

Free tier available

Developer-friendly open-source embedding database: the easiest way to add vector search to a prototype.

LanceDB

Free tier available

Serverless, embedded vector database that runs inside your app process: no infrastructure to manage.

Milvus

Free tier available

Open-source vector database built for billion-scale embeddings, with managed Zilliz Cloud option.

Pinecone

Free tier available

Fully managed serverless vector database for AI search and RAG, with hybrid search and per-tenant namespaces.

Qdrant

Free tier available

High-performance open-source vector search engine with rich payload filtering: great for agent memory and RAG.

Weaviate

Free tier available

Open-source vector database with built-in vectorization modules and hybrid search for RAG applications.

Bitbucket

Free tier available

Atlassian's Git host: cheapest per seat of the big three, and the one that plugs straight into Jira.

Gitea

Free tier available

A lightweight self-hosted Git service that runs from a single binary: the whole forge on hardware you control.

GitHub

Free tier available

Where the code, the pull requests and most of the people who might contribute to them already are.

GitLab

Free tier available

One application for repos, CI/CD, security scanning and releases, and the only major host you can also run yourself.

Graphite

Free tier available

Stacked pull requests and AI code review on top of GitHub, for teams where review latency is the bottleneck.

Descript

Free tier available

Edit video and podcasts by editing the transcript.

Loom

Free tier available

Async video messaging: record your screen and camera to explain things faster than meetings. Free tier available.

Riverside

Free tier available

Studio-quality remote recording with local capture.

Vidyard

Free tier available

Async video messaging built for sales and marketing, with viewer analytics and CRM integrations.

Zight

Free tier available

All-in-one screen recording, GIFs, and screenshots with instant shareable links (formerly CloudApp).

Video API with free unlimited encoding, priced per minute hosted and per minute delivered, plus live streaming and analytics.

Video API for developers: upload, encode, store and stream adaptive video with per-title encoding and real-time viewer analytics.

Video hosting built for marketing teams: player customisation, lead capture forms, heatmaps and CRM integrations.

LiveKit

Free tier available

Open-source real-time media server and Agents framework for building voice AI. Self-host free, or use LiveKit Cloud.

NetBird

Free tier available

Open-source WireGuard mesh you can self-host, or buy hosted.

Tailscale

Free tier available

WireGuard mesh VPN that connects your machines to each other, not to an exit country.

Twingate

Free tier available

Zero-trust remote access: per-resource permissions rather than a network-wide tunnel.

WireGuard

Free tier available

The protocol underneath most of this category: run it yourself on a VPS.

Marketplace and runtime for 'Actors': thousands of prebuilt scrapers you can rent, plus a platform to deploy your own.

Scraper API over the largest commercial proxy network, priced per 1,000 records delivered rather than per request.

Turns any site into LLM-ready markdown with one API call: crawl, scrape, search and extract, with JS rendering and proxies handled for you.

Enterprise-grade scraping API on top of one of the largest residential proxy networks, billed per 1,000 successful results.

Convoy

Free tier available

Self-hosted webhooks gateway for sending and receiving webhooks, with retries, rate limiting and circuit breaking. Source-available under the Elastic License 2.0.

Hook0

Free tier available

Webhooks server and UI you can self-host for free or use as a European cloud. Source-available under the SSPL.

Hookdeck

Free tier available

Event gateway for receiving, queueing and routing webhooks reliably, with retries, filtering and replay. Outpost, its outbound sender, is open source (Apache-2.0).

Svix

Free tier available

Webhooks as a service: send webhooks to your customers with retries, signing, an embeddable endpoint portal and replay. The server is open source (MIT).

Carrd

Free tier available

One-page sites for $19 a year.