Cybersecurity Stars Awards · By The Hacker News
2026 WINNER · CYBERSECURITY STARS AWARDS

Jscrambler · Client-Side Security Platform

Best AI Runtime Defense Platform
2026 Winner medal
Jscrambler logo
Company
Jscrambler
Location
Portugal
Website
jscrambler.com
Team Size
50 - 99 employees
01

Overview

Jscrambler is the leader in Client-Side Security for the modern, composable web.

It turns enterprise policy into enforceable control at the point where digital interactions are created - inside the browser.

As organizations increasingly build digital experiences through third-party software supply chains and AI-powered agents, sensitive data is now created directly in the browser - the point of creation for digital interactions - making it one of the enterprise's most privileged yet least governed attack surfaces.

Jscrambler's Client-Side Security Platform is powered by a Behavioral Enforcement Core that governs how application code, third-party scripts, and sensitive data behave at runtime. By enforcing software integrity and data governance directly in the browser, the platform ensures sensitive data and AI inputs are controlled according to enterprise policy at the point of creation - before they leave the client environment.

Trusted by leading global retailers, airlines, financial services providers, and healthcare organizations, Jscrambler provides the visibility and enforcement organizations need to stop client-side attacks, prevent data leakage, and maintain compliance with regulations including PCI DSS, GDPR, HIPAA, CCPA, and the EU AI Act.

02

Key Capabilities

Jscrambler governs execution directly inside the browser runtime, extending enterprise protection beyond the traditional security edge. The Jscrambler Client-Side Security Platform controls the entire lifecycle of how scripts, especially AI-powered scripts, behave in the user's browser.

Key capabilities relevant to AI runtime defense include:

  • Runtime protection: Jscrambler offers runtime protection through its Behavioral Enforcement Core which monitors script activity in real-time. If a script behaves abnormally-for example, extracting sensitive data it shouldn't-Jscrambler can block that specific action. The Jscrambler Client-Side Security Platform also uses obfuscation and anti-tampering to make the code itself difficult for attackers to manipulate.

  • Data fencing: Jscrambler identifies sensitive input fields like credit card or login forms and implements data fencing to restrict which scripts can access or interact with that data. This prevents AI agents from scraping unauthorized page content or sensitive user inputs at the source.

  • Exfiltration prevention: Jscrambler controls data sent out by monitoring network requests and data flows. If an AI script or third-party tag attempts to exfiltrate data to an unauthorized global dataset or external server, Jscrambler can block the network connection immediately to prevent data leakage.

Jscrambler ensures that AI-powered scripts are only allowed to perform their intended tasks and nothing more.

03

How we are different

Security no longer ends at the network boundary. The Jscrambler Client-Side Security Platform closes the structural control gap in modern digital architecture by extending enforceable enterprise policy into browser execution - where digital business now runs.

Application logic executes in the browser. Third-party services operate alongside it. Sensitive data is assembled and transmitted there. AI-driven experiences construct context in real time and AI inputs are formed there.

Jscrambler pioneered and leads the Client-Side security category. Legacy approaches miss the mark:

  • Efforts to create in-house script-protection solutions often fail due to complexity and lack of specialized knowledge.

  • Open-source solutions are incompatible with the high stakes of client-side innovation, often breaking code and providing insufficient parameter granularity.

  • WAFs, WAAP suites, and Content Delivery Networks (CDN) aren't built for client-side protection, resulting in inadequate protection.

  • Content security policy (CSP) requires manual updates while leaving gaps in protection due to third-party risks, unsecured iframes, hidden code tricks, "report-only" mode monitoring, and setup challenges.

The company's track record of industry-first innovations and continuous advancements has firmly established Jscrambler as the unrivaled leader. Jscrambler was the first to:

  • Introduce a comprehensive Client-Side Protection and Compliance Platform that covers first-party JavaScript obfuscation and third-party tag monitoring and protection.

  • Introduce a first-party JavaScript obfuscation product, setting industry standards in this category ever since.

    • First to tailor obfuscation in support of specific performance thresholds, support smart obfuscation based on app type and dependencies

    • First to offer polymorphic obfuscation, virtual machine-based obfuscation in JavaScript, JavaScript environment (e.g. browser and OS locks) integrity checks, dead objects debugging detection, autonomous JavaScript code lock, self-defending code protection, self-healing code protection, JavaScript-based watermarking protection, JavaScript telemetry and central monitoring, and anti-Monkey Patching protection

    • First to offer code protection to be AI and LLM-resistant.

    • First to monitor monkey patching of DOM APIs.

    • First to allow programming of customized countermeasure rules.

  • Introduce a third-party tag monitoring and protection product, setting industry standards in this category since its inception.

    • First to protect every user, every page, and every script.

    • First to rely 100% on code behavior, rather than on file checksums or signatures.

    • First to prevent Function Hijacking (and to coin the term).

    • First protection against memory scraping.

    • First to introduce DOM tamper detection and prevention.

    • First to deploy fencing of forms, cookies, browser storage, and HTML elements.

04

Gallery

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