Israeli AI-native cybersecurity company Tenzai, which is redefining penetration testing through autonomous, agentic AI, today announced it has emerged from stealth with a $75 million seed round. The round was led by Greylock Partners, Lux Capital, and Battery Ventures, with participation from Swish Ventures and prominent angel investors.
Tenzai was founded just six months ago by cybersecurity veterans Pavel Gurvich, Ariel Zeitlin, Ofri Ziv, Itamar Tal, and Aner Mazur. Gurvich and Zeitlin previously cofounded Guardicore, with Ziv and Tal as part of the company’s founding team. Guardicore was later acquired by Akamai in 2021 for $600 million, one of Akamai’s largest acquisitions to date. Mazur was founding CPO at Snyk. The team has major cyberattack experience from their service in military intelligence and in leading security teams. Tenzai currently has 20 employees.
Tenzai cofounder and CEO 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.”
With the funding, Tenzai will expand its AI research and security teams, enhance its autonomous offensive capabilities, and grow its marketing presence in North America and Europe. Customers already include leading enterprises in financial services, healthcare, and technology sectors.
Published by Globes, Israel business news – en.globes.co.il – on November 11, 2025.
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