Source Defense is a security and data privacy compliance platform for any website that collects sensitive data or is transaction oriented. It addresses a ubiquitous gap in the management of third-party digital supply chain risk with a model that extends security beyond the network to the client-side. As the pioneer and market leader in web application client-side protection, Source Defense provides real-time threat detection, protection and prevention of vulnerabilities originating in JavaScript. Source Defense protects sensitive data at the point of input – inside the browser – where modern web attacks actually occur.
As websites have become increasingly dependent on JavaScript, third-party services, and open-source code, a critical security gap has emerged. Traditional defenses stop at the network and server layers, leaving organizations exposed to client-side attacks such as eSkimming, formjacking, and unintended data leakage. Source Defense was built to close that gap.
By continuously monitoring and controlling how scripts execute in the browser, the patented Source Defense platform detects and prevents data leakage and exfiltration before sensitive information can be stolen or misused.
Source Defense is trusted by more than 1,000 of the world’s most demanding brands, including Fortune 500 enterprises across financial services, retail, eCommerce, healthcare, travel, and other transaction-driven industries.
As a Principal Participating Organization and member of the PCI Board of Advisors within the PCI Security Standards Council, Source Defense has played a direct role in shaping the eSkimming security requirements introduced in PCI DSS 4.0.1, including requirements 6.4.3 and 11.6.1.
Headquartered in Israel with operations across the United States and a strong global partner ecosystem, Source Defense works closely with card brands, merchants, payment service providers, Qualified Security Assessors, and technology partners to secure the modern web. Independent assessments by firms such as Coalfire and VikingCloud validate the platform’s effectiveness in both real-world security and PCI compliance.
Source Defense is purpose-built to address today’s client-side threats and tomorrow’s evolving attack techniques – delivering protection that is proactive, scalable, and operationally simple. For organizations that rely on the web to conduct business, Source Defense provides the control, visibility, and assurance needed to prevent website data theft and leakage at the source.
Our Mission
Enabling companies to leverage their websites to drive business forward, further and faster, while ensuring security, compliance, and customer data privacy.
Our Story
The Source Defense story began when its co-founders encountered security and data breaches along their careers, generated by website supply chain vendors they worked with. They looked for a solution, only to realize no real one exists.
Being devoted problem solvers, our founders decided to start working on a solution themselves and founded Source Defense back in 2014.
Today, Source Defense provides a unique website security, data privacy and compliance solution focused on preventing inadvertent data leakage and malicious activity originating in website supply chain vendors. These include analytics, advertising, chat, payment solutions and more. Every website today uses such tools to enhance user experience, engagement and insights.
Using a first-of-its-kind technology based on machine learning, AI and industry best practices, Source Defense provides its customers with a fully automated and dynamic set of rules and policies that control access and permissions of all Javascript-based 3rd party tools operating on their website.