Kevin Mandia, known for founding the cybersecurity firm Mandiant which Google acquired for $5.4 billion in 2022, has launched a new venture called Armadin. The startup recently secured $255.5 million in a Series B funding round led by Andreessen Horowitz and Accel, boosting its valuation to $2.5 billion. This funding comes a mere six months after Armadin’s $190 million Series A raise, bringing total investment raised to over $445 million.

Armadin’s approach to cybersecurity marks a shift from traditional methods. Instead of relying on occasional penetration tests by human experts, the company employs continuous “agentic swarms” – interconnected AI-driven agents that actively probe and exploit vulnerabilities in an enterprise’s defenses. This ongoing testing aims to uncover security weaknesses in real time, allowing organizations to patch them before malicious actors or rogue AI agents can exploit those gaps.

The startup’s technology is designed for the age of AI, anticipating that attackers could use sophisticated autonomous agents to breach systems. By simulating similar AI-powered attack swarms, Armadin helps companies preemptively harden their defenses. This proactive, always-on security model could offer a new level of protection as cyber threats become increasingly automated and complex.

Backed by a prestigious roster of investors including Bain Capital Ventures, Google Ventures, and Kleiner Perkins, Armadin is positioning itself as a leader in next-generation cybersecurity solutions. The company’s rapid fundraising success and high valuation reflect strong market confidence in its innovative approach to defending enterprises from evolving digital threats.