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Source Defense

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Who is Source Defense?

Source Defense is a private cybersecurity company that provides client-side web application security controls for enterprises, with a focus on monitoring and restricting third-party JavaScript and browser-side data flows in digital commerce and other web environments.

  • Client-side web application security for browser-executed scripts
  • Third-party script monitoring, control, and policy enforcement
  • Protection against formjacking, digital skimming, and web supply chain attacks
  • Support for payment page security and related compliance use cases
  • Continuous visibility into browser-side behavior, dependencies, and data access
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More About Source Defense

Source Defense operates in professional services and enterprise security markets, with offerings used by organizations that run public-facing websites, online payment flows, customer portals, and other browser-based applications. Its technology is typically positioned as a control layer for risks that sit outside conventional server-side application security, especially risks introduced by third-party code, tags, and content loaded into the browser at runtime. Common enterprise use cases include e-commerce checkout protection, monitoring of payment pages, and governance over digital supply chain dependencies in web applications.

Its solutions are associated with client-side security architectures that inspect and enforce behavior in the user browser, rather than relying only on network perimeter tools or server instrumentation. The technical domain overlaps with browser integrity controls, content security policy enforcement, script allowlisting, page-level monitoring, and detection of unauthorized changes in JavaScript execution or data collection paths. In practice, these controls address attack patterns such as Magecart-style skimming, formjacking, and abuse of trusted third-party services embedded in web pages.

Compared with broader web application security categories such as web application firewalls or bot mitigation, Source Defense addresses a narrower problem set centered on what executes after the page reaches the browser. That makes it relevant for security, fraud, digital commerce, and compliance teams that need visibility into script behavior and access to sensitive form fields. Its offerings are also relevant where organizations must document controls around payment data exposure in the browser and reduce dependence on manual review of third-party code.

Within its market position, Source Defense is best understood as a company-focused provider of enterprise cybersecurity services and products for client-side application protection. Its current solution areas align with web security, application security, payment page protection, and third-party script governance for enterprise websites and digital transaction environments.

Our description of Source Defense. Updated September 2026.

Market segments

  • Industrials / Commercial & Professional Services / Professional Services

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Headquarters
Israel

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