Best Client-Side Protection Platforms
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Compare the Top Client-Side Protection Platforms as of January 2026
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What are Client-Side Protection Platforms?
Client-side protection platforms are security tools designed to protect users from threats that can arise when interacting with websites. These platforms monitor and secure the client-side environment, such as web browsers, against vulnerabilities like cross-site scripting (XSS), malicious JavaScript, and other client-side attacks. They provide features such as real-time threat detection, script monitoring, and content security policies (CSP) enforcement to ensure that the web content being loaded is safe and hasn't been tampered with. By securing the client side, these platforms help prevent data breaches, session hijacking, and unauthorized access to sensitive information during web interactions. This protection is crucial for maintaining the integrity and security of online user experiences. Compare and read user reviews of the best Client-Side Protection platforms currently available using the table below. This list is updated regularly.
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1
Reflectiz
Reflectiz
Reflectiz offers advanced client-side protection, securing web assets from vulnerabilities in third-party components like scripts, trackers, and open-source libraries. These client-side elements are often overlooked by traditional tools, making them prime targets for security breaches. Operating remotely with zero impact on website performance, Reflectiz provides real-time visibility into third-party risks and vulnerabilities. It continuously monitors third-party code and external resources, proactively detecting threats before they escalate. With AI-powered risk detection and real-time alerts, Reflectiz automates the identification of client-side vulnerabilities, enabling businesses to block threats immediately. This solution enhances data privacy, ensures compliance, and protects web applications without the need for code changes, making it an essential part of any client-side security strategy.Starting Price: $5000/year -
2
Jscrambler
Jscrambler
Jscrambler is the leader in Client-Side Protection and Compliance. Jscrambler is the first to merge advanced polymorphic JavaScript obfuscation with fine-grained third-party tag protection in a unified Client-Side Protection and Compliance Platform. Jscrambler's integrated solution ensures a robust defense against current and emerging client-side cyber threats, data leaks, and IP theft, empowering organizations to innovate securely online with JavaScript. Jscrambler's Code Integrity product safeguards first-party JavaScript through state-of-the-art obfuscation and exclusive runtime protection. Its Webpage Integrity product mitigates threats and risks posed by third-party tags, all while ensuring compliance with PCI DSS v4. Iframe Integrity empowers PSPs to deliver seamless protection, PCI DSS compliance, and SAQ A eligibility to merchants. With Jscrambler, businesses adopt a unified, future-proof client-side security policy, all while achieving streamlined compliance. -
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cside
cside
100 % session coverage, DOM-level diffing, conditional threat detection (geo/time/user cohort). c/side sits in the path of every third-party request, fetches the actual JavaScript, and inspects it in real time. So malicious code is blocked before the browser can execute a single line.Starting Price: $99 per month -
4
Cloudflare
Cloudflare
Cloudflare is the foundation for your infrastructure, applications, and teams. Cloudflare secures and ensures the reliability of your external-facing resources such as websites, APIs, and applications. It protects your internal resources such as behind-the-firewall applications, teams, and devices. And it is your platform for developing globally scalable applications. Your website, APIs, and applications are your key channels for doing business with your customers and suppliers. As more and more shift online, ensuring these resources are secure, performant and reliable is a business imperative. Cloudflare for Infrastructure is a complete solution to enable this for anything connected to the Internet. Behind-the-firewall applications and devices are foundational to the work of your internal teams. The recent surge in remote work is testing the limits of many organizations’ VPN and other hardware solutions.Starting Price: $20 per website -
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Source Defense
Source Defense
Source Defense is a mission critical element of web security designed to protect data at the point of input. The Source Defense Platform provides a simple and effective solution for data security and data privacy compliance – addressing threats and risks originating from the increased use of JavaScript, third-party vendors, and open-source code in your web properties. The Platform provides options for securing your own code, as well as addressing a ubiquitous gap in the management of third-party digital supply chain risk – controlling the actions of the third-party, fourth and nth party JavaScript that powers your site experience. The Source Defense Platform protects against all forms of client-side security incidents – keylogging, formjacking, digital skimming, Magecart, etc. – by extending web security beyond the server to the client-side (the browser). -
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ByteHide
ByteHide
ByteHide is an all-in-one, developer-first application security platform designed to protect code, secrets, data, and runtime environments, while minimizing your dependencies and risk. It integrates seamlessly with your development workflows and communication tools, delivering key security insights and alerts without disrupting productivity. Operating under a zero-knowledge model, ByteHide uses client-side encryption so only you hold the keys, and it never stores your source code. With minimal, typically read-only permissions, you remain fully in control of what repositories and data sources are analyzed. ByteHide’s core tools include Shield for next-generation code obfuscation and anti-tampering, Secrets for AI-powered secret detection and decentralized management, Monitor for real-time runtime threat detection, and Radar for unified SAST/SCA scanning. These tools run in secure, isolated environments and automatically mask sensitive personal data.Starting Price: €39.99 per month -
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Javascript Obfuscator
Javascript Obfuscator
JavaScript Obfuscator transforms readable JavaScript source code into an obfuscated and unintelligible form, preventing reverse engineering, tampering, and intellectual property theft while preserving full functionality and compatibility with the latest ECMAScript versions. It includes powerful features such as minification and compression for reduced file size and faster load times, dead code insertion to confuse static analysis, and domain- or IP-based locking to disable code execution outside authorized environments. The tool provides GUI-driven desktop batch processing that allows users to protect JavaScript embedded in HTML, PHP, JSP, or similar files with just a few clicks, and supports keeping initial comments or inserting custom headers into output files. Advanced controls let you exclude certain names from obfuscation and ensure consistent symbol renaming across multiple files.Starting Price: Free -
8
jsObf
jsObf
jsObf is a powerful, web-based JavaScript encryption and obfuscation tool that enables users to transform readable JavaScript code into obfuscated, secure versions via direct input or file uploads (up to 5 MB). It also serves developers through its API, offering two endpoints, one for raw code and another for file uploads, with configurable output formats (JSON or XML) and adjustable complexity levels. It simplifies protection workflows with intuitive, drag-and-drop interfaces and backend API support, empowering users to quickly mask logic, thwart reverse engineering, and secure proprietary scripts without complex setup or tooling.Starting Price: $49.99 per month -
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Imperva Client-Side Protection
Imperva
Client-Side Protection provides real-time monitoring of all client-side resources and JavaScript behavior. Gain control over all first and third-party JavaScript code embedded on your website. Actionable insights make it easy to identify risky resources and scripts that should not load on your client side. And if any JavaScript code is compromised, your security team is the first to know. Provides comprehensive inventorying, authorization, dynamic integrity verification, and real-time monitoring, helping streamline regulatory compliance with the new client-side security requirements introduced in PCI DSS 4.0. Protect your website against client-side attacks and streamline regulatory compliance with PCI DSS 4.0. Client-side attacks increase as web applications shift to client-side logic and incorporate more third-party code and resources. These attacks can directly steal sensitive customer data, resulting in breaches and noncompliance with data privacy regulations. -
10
Client-Side Protection helps protect against end-user data exfiltration and shield websites from JavaScript threats. It analyzes script behavior in real-time, provides actionable insights in a single dashboard view, and delivers alerts to mitigate harmful script activity. Designed for PCI DSS v4.0, the solution helps businesses meet new script security requirements and safeguards against client-side attacks. Inject simple scripts into each monitored page without meaningfully impacting performance. Monitor and assess script activity from the browser while machine learning techniques analyze the risk of unauthorized action. Get real-time alerts, with detailed information about mitigation, if an active threat or attack is found. Immediately restrict malicious scripts from accessing and exfiltrating sensitive data on protected pages with one click. Defend your site from client-side threats. Ease compliance with PCI DSS v4.0. Strengthen your web page integrity.
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11
Feroot
Feroot Security
Feroot believes that businesses and their customers should be able to engage in a safe and secure online user experience. Whether it’s leveraging the purchasing power of an e-commerce website, accessing internet-based healthcare services, or transferring funds between financial accounts, Feroot's sole mission is to secure client-side web applications so that users can engage safely in online environments. Our products help organizations uncover supply chain risks and protect their client-side attack surface. With Feroot Inspector, businesses can scan, monitor, and enforce security controls to prevent data loss incidents within software logic on the front end caused by compromised JavaScript, third parties and configuration weaknesses. Our data protection capabilities significantly minimize time- and labor-intensive code reviews and threat analysis, and remove the ambiguity associated with client-side security detection, response, and prevention. -
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Human Defense Platform
HUMAN
HUMAN is a leading cybersecurity company committed to protecting the integrity of the digital world. We verify that digital interactions, transactions, and connections are authentic, secure, and human. The Human Defense Platform safeguards the entire customer journey with high-fidelity decision-making that defends against bots, fraud, and digital threats. Each week, HUMAN verifies 20 trillion digital interactions, providing unparalleled telemetry data to enable rapid, effective responses to even the most sophisticated threats. Recognized by our customers as a G2 Leader, HUMAN continues to set the standard in cybersecurity. -
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otto-js
otto
otto-js understands what it takes to work with small & mid-sized businesses. While many SMBs choose otto-js directly through one of our many no-code platform plugins, for large partners, who also service the SMB market, we have a flexible, robust, API capable of onboarding thousands of customers in a flash. We work with others to help consolidate vendor sprawl, consolidating costs & integration time. otto-js is committed to being there when you need us, regardless of platforms, stack, and integrations. That's why we've kept our learning curb low and our return on value high. Shoppers are more than 90% more likely to buy online from brands they trust. Proving you are a safe and compliant website is one of the number one ways to develop trust quickly and increase conversions. -
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Cloudflare Page Shield
Cloudflare
Backed by our world-class threat intelligence and machine learning capabilities, Page Shield helps defend against client-side attacks that target vulnerable JavaScript dependencies. Detect and mitigate browser supply chain attacks with machine learning-based protection. Get instant notifications when new scripts are detected, marked as malicious, or loaded from unknown domains. Reduce third-party vendor risk and address client-side requirements like GDPR, PCI, and more. Page Shield simplifies third-party script management by tracking loading resources (like scripts) for potentially malicious additions, connections, or changes. Powered by our threat intelligence and machine learning-based detection, it instantly identifies, reports, and blocks threats, before they reach your website. Block browser-based attacks aimed at your users’ personal and financial information. Monitor JavaScript dependencies and block threats with threat intelligence and machine learning.
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