Tenzai has emerged from stealth with a $75m seed round — one of the largest ever recorded in the cybersecurity sector.
The record-breaking round was co-led by Greylock Partners, Battery Ventures, and Lux Capital, with participation from Swish Ventures and several angel investors. The fresh capital reflects strong investor confidence in Tenzai’s approach to securing AI-generated code in a rapidly evolving digital landscape.
Founded by cybersecurity veterans Pavel Gurvich, Ariel Zeitlin, Ofri Ziv, Itamar Tal, and Aner Mazur, Tenzai specialises in autonomous penetration testing powered by AI. The company’s platform enables continuous and scalable testing, designed to identify vulnerabilities in code written and deployed by AI systems. With more than 30% of newly written code now generated by AI, Tenzai aims to deliver real-time assurance that keeps pace with the speed of modern software development.
The new funds will be used to expand Tenzai’s AI research and security teams, enhance its autonomous offensive capabilities, and strengthen its go-to-market presence across North America and Europe. The company has already initiated early deployments with clients in financial services, healthcare, and technology.
Tenzai CEO and co-founder Pavel Gurvich said, “Pentesting hasn’t changed much since I was a pentester in high school some 25 years ago. Back then the work was episodic and manual. Today, AI allows us to bring elite, nation-grade offensive capabilities at a scale and speed that were previously impossible. In large enterprises with hundreds of applications that change daily, providing real security assurance is only possible with autonomous AI that can find and fix vulnerabilities at enterprise scale. That’s why we built Tenzai – to bring always-on offensive capabilities so organizations can move fast and stay secure.”
Tenzai’s founding team brings deep expertise from both the private and defence sectors. Gurvich and Zeitlin co-founded Guardicore, with Ziv and Tal as part of its founding team; Guardicore was later acquired by Akamai in 2021 for $600m. Mazur previously served as founding chief product officer at Snyk, another cybersecurity pioneer.
Greylock Partners partner Asheem Chandna said, “AI generated code is creating new cybersecurity risks and challenges for enterprises. We are excited to partner with the exceptionally talented team at Tenzai, on the mission to build the industry’s leading agentic AI penetration testing platform.”
With its seasoned leadership team and strong investor backing, Tenzai is positioning itself at the forefront of AI-driven cybersecurity innovation, providing enterprises with continuous, scalable protection in an era dominated by machine-generated code.
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