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§ Private Profile · Kfar Yona, HaMerkaz, Israel
Source Defense is a technology company.
Source Defense develops a security and data privacy compliance platform, extending protection beyond the traditional network perimeter to the client-side. Its patented technology delivers real-time threat detection, protection, and prevention against vulnerabilities arising from JavaScript and third-party scripts. The platform utilizes machine learning and artificial intelligence to continuously monitor and control script execution within the browser, safeguarding sensitive data from leakage and exfiltration at the point of input. This innovative approach addresses a critical gap in managing the digital supply chain risk of modern websites.
Founded in 2014 by Hadar Blutrich and Avital Grushcovski, the company emerged from the founders' direct experiences with security breaches caused by website supply chain vendors. Recognizing a significant void where no effective solution existed to counter these prevalent client-side threats, they decided to develop a comprehensive platform. Their insight led to the creation of a solution that specifically targets the growing risks posed by third-party JavaScript and its interactions within web browsers.
Source Defense serves demanding brands globally, including Fortune 500 enterprises across financial services, retail, e-commerce, healthcare, and other transaction-driven sectors. Its mission is to enable companies to leverage their websites for business growth while ensuring robust security, compliance, and customer data privacy. The company aims to address both current client-side threats and evolving attack techniques with proactive, scalable, and operationally simple protection, providing control and visibility to prevent data theft and leakage.
Source Defense has raised $42.0M across 3 funding rounds.
Source Defense has raised $42.0M in total across 3 funding rounds.
Source Defense has raised $42.0M across 3 funding rounds. Most recently, it raised $27.0M Series B in April 2022.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Apr 1, 2022 | $27M Series B | Karel Tušek | Balderton Capital, Energy Impact Partners, Jerusalem Venture Partners, MizMaa Ventures, NEVA SGR, Teclub, Aaron Rosenson, AllegisCyber Capital, Capital ONE Ventures, Connecticut Innovations, Global Brain, Yoav Tzruya, NightDragon | Announced |
| May 1, 2020 | $5M Series A | — | AllegisCyber Capital, Balderton Capital, Energy Impact Partners, Jerusalem Venture Partners, MizMaa Ventures, NEVA SGR, Teclub, Aaron Rosenson, AllegisCyber Capital, Capital ONE Ventures, Global Brain, Yoav Tzruya, Dave Dewalt | Announced |
| Sep 1, 2018 | $10M Series A | — | Balderton Capital, Energy Impact Partners, Jerusalem Venture Partners, MizMaa Ventures, NEVA SGR, Teclub, Aaron Rosenson | Announced |
Source Defense is a cybersecurity company that builds a patented platform for real-time detection, protection, and prevention of client-side web threats, including digital skimming, formjacking, keylogging, and Magecart attacks stemming from JavaScript, third-party vendors, and open-source code.[1][2][4][5] It serves financial institutions, online retailers, healthcare providers, media publishers, and eCommerce businesses handling sensitive data, solving the gap in securing websites at the client-side where data is entered and third-party scripts pose risks to compliance, performance, and user experience.[1][2][5] The platform includes the ADMIN management console, VICE sandboxing solution, and Website in Page Protection (WiPP) data shield, protecting about 1.5 billion monthly visitors while enabling PCI, GDPR, and other compliance.[1][2][4]
Founded in 2014 with headquarters in Rosh-Ha’ayin, Israel, and operations in the U.S., the company (50-99 employees) has shown strong growth, including over 250% year-over-year ARR increase in 2019/2020, 100% customer retention, multi-year bookings, and partnerships with Optiv, Fastly, Signal Sciences, and the PCI Security Standards Council.[1]
Source Defense was founded in 2014 in Rosh-Ha’ayin, Israel, addressing the rising vulnerabilities from JavaScript proliferation, third-party scripts, and open-source code in modern websites.[1][2] Specific founders are not detailed in available sources, but the company emerged amid growing client-side threats like Magecart attacks, filling a market gap in real-time protection beyond traditional browser or server security.[4][5] Early traction built through its patented technology, leading to adoption by Fortune 500 enterprises in finance, retail, healthcare, and eCommerce; by recent years, it protected 1.5 billion monthly visits and thwarted 2 billion JavaScript violations, with explosive growth in ARR (250%+ YoY in 2019/2020) and full customer retention.[1]
Source Defense rides the surge in client-side attacks amid heavy reliance on JavaScript, third-party vendors, and open-source libraries, which power most websites but introduce unchecked vulnerabilities like Magecart and formjacking.[1][2][4][5] Timing aligns with escalating eCommerce growth, regulatory pressures (GDPR, PCI), and supply chain threats, where traditional server-side tools fall short—protecting data at entry points for high-stakes sectors like finance and healthcare.[1][2] It influences the ecosystem by setting standards in client-side security, fostering partnerships with major players, and educating via Cyber Academy, while enabling safer digital experiences for billions of users and reducing breach costs for enterprises.[1][4]
Source Defense is positioned for continued expansion in a client-side security market ballooning with web complexity and cyber threats, leveraging its patented tech and growth trajectory (250%+ ARR spikes, 100% retention) to capture more Fortune 500 clients.[1] Next steps likely include scaling sales/marketing teams, deepening integrations, and global channel growth amid rising Magecart incidents and compliance demands.[1][4] Trends like AI-driven attacks, zero-trust web architectures, and third-party risk regulations will amplify its relevance, potentially evolving it into a broader web optimization leader—securing the open web as third-party dependencies intensify. This builds on its core strength: transforming client-side risks into protected, performant experiences for the digital economy.[1][2][5]
Source Defense has raised $42.0M in total across 3 funding rounds.
Source Defense's investors include Karel Tušek, Balderton Capital, Energy Impact Partners, Jerusalem Venture Partners (JVP), MizMaa Ventures, NEVA SGR, TeClub, Aaron Rosenson, AllegisCyber Capital, Capital One Ventures, Connecticut Innovations, Global Brain.