Mandiant founder's new AI security firm Armadin has found 90+ zero-days in Fortune 500 networks
a16z · x · 2026-10-06
a16z-backed Armadin uses AI agents to attack customer networks before criminals do: mapping every service, route, and system from the outside, re-attacking on changes, and autonomously discovering real exploitable zero-days. Since January it has uncovered 90+ zero-days at Fortune 500 companies.
Founder Kevin Mandia spent 30 years responding to the world's worst breaches and built Mandiant, now part of Google Cloud's security arm. He had no plans to start another company until AI changed everything — in his words, "everything I did is dead."
The conversation covers what AI attacks look like today, why nation-states hack like a sniper while AI hacks like a drone swarm, and why the only fast-enough defense is AI-driven.
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