Armadin raises $255.5M at $2.5B valuation for AI agents
Armadin, the cybersecurity startup led by Mandiant founder Kevin Mandia, has closed a $255.5 million Series B round. The deal values the company at more than $2.5 billion.
The round brings Armadin's total funding to $445 million. The company publicly launched only seven months ago.
Andreessen Horowitz and existing investor Accel co-led the round. Bain Capital Ventures and Redpoint joined as new investors. Existing backers 8VC, Ballistic Ventures, GV, In-Q-Tel, Kleiner Perkins and Menlo Ventures also took part.
A fast climb from seed to Series B
Armadin first appeared quietly in late 2025 with a $24 million seed investment. It formally launched in March 2026 with $189.9 million in funding. The Series B arrives just months later.