Compare the Top Unified APIs as of December 2025

What are Unified APIs?

Unified APIs are a type of application programming interface (API) that allow companies and organizations to integrate multiple services into one convenient platform. Unified APIs provide developers with a comprehensive set of tools and resources that can be used to build, maintain, and manage custom applications. These APIs enable users to access information from several different sources in one place in order to improve the efficiency of their workflows. Unified APIs also provide users with the ability to communicate between different applications and services, making it easier for developers to create complex interconnected systems. Finally, unified APIs enable the use of powerful analytics tools for more accurate decision-making based on data stored in multiple systems. Compare and read user reviews of the best Unified APIs currently available using the table below. This list is updated regularly.

  • 1
    Merge

    Merge

    Merge.dev

    Merge is the leading
Unified API platform that enables B2B software companies to add hundreds of integrations to their products—making it easy for them to access and sync their customers’ data. ‍Merge's Unified APIs provide normalized data across key software categories, including accounting, HRIS, ATS, CRM, file storage, and ticketing. Merge also handles the full integrations lifecycle—from an easy initial build that takes just weeks to providing integration observability tools to help your customer-facing teams manage integrations. Thousands of companies—like BambooHR, Ramp, and Ema—trust Merge to power integrations that unblock sales, reduce customer churn, accelerate time to market for new products, and save engineering costs and resources.
    Starting Price: Free
  • 2
    APIPark

    APIPark

    APIPark

    APIPark is an open-source, all-in-one AI gateway and API developer portal, that helps developers and enterprises easily manage, integrate, and deploy AI services. No matter which AI model you use, APIPark provides a one-stop integration solution. It unifies the management of all authentication information and tracks the costs of API calls. Standardize the request data format for all AI models. When switching AI models or modifying prompts, it won’t affect your app or microservices, simplifying your AI usage and reducing maintenance costs. You can quickly combine AI models and prompts into new APIs. For example, using OpenAI GPT-4 and custom prompts, you can create sentiment analysis APIs, translation APIs, or data analysis APIs. API lifecycle management helps standardize the process of managing APIs, including traffic forwarding, load balancing, and managing different versions of publicly accessible APIs. This improves API quality and maintainability.
    Starting Price: Free
  • 3
    Tray.ai

    Tray.ai

    Tray.ai

    Tray.ai is an API integration platform that allows users to innovate, integrate, and automate organization with no developer resources needed. Tray.io enables users to connect their entire cloud stack on their own. With Tray.ai, users can easily build and streamline processes with a specifically designed visual workflow editor. Tray.io also empowers the users' workforce with automated processes. The intelligence powering the first iPaaS that everyone can use to complete business processes using natural language instructions. Tray.ai is a low-code automation platform designed for both non-technical and technical users to create sophisticated workflow automations that facilitate efficient data movement and actions across multiple applications. Our low-code builder and new Merlin AI transform the automation process by bringing together the power of flexible, scalable automation; support for advanced business logic; and native generative AI capabilities that anyone can use.
  • 4
    Scade

    Scade

    Scade.pro

    Develop products and services, streamline your business processes, marketing, sales and finance with AI – all effortlessly. Boost your business with Scade Pro’s 1,500+ AI tools. Optimize from marketing to sales with no coding needed. Customize yourself or select our turnkey AI setup service. Unlock rapid development with Scade Pro’s unified API/SDK. Integrate AI quickly, reducing time and costs. Benefit from visual programming for smart features, with expert support available for ambitious projects. Quickly deliver projects using our no-code platform and unified API, cutting down on development time. Seamlessly integrate AI for top-tier solutions or profit from your apps on our marketplace. Offer your clients groundbreaking marketing tools and campaigns with AI through Scade Pro. Integrators, enhance client operations with deep automation in CRM and ERP. Boost sales and services using our technology, customized to meet your unique demands.
  • 5
    TartanHQ

    TartanHQ

    TartanHQ

    TartanHQ is a technology firm dedicated to resolving the challenges posed by fragmented systems within enterprises. It offers Unified APIs that integrate third-party applications like HRMS, CRM, and ERPs with the enterprise software and B2B SaaS Tools. Tartan also deploys AI-driven agentic apps to solve for Business process optimisation, automation, visibility, insights, intelligence, and efficiency within corporations.
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