Kevin Mandia's Armadin raises $255.5M at $2.5B valuation

Armadin, the security startup founded by Mandiant creator Kevin Mandia, raised $255.5 million in a Series B at a valuation above $2.5 billion. The round was led by Andreessen Horowitz and Accel, bringing total funding to more than $445 million in six months. Armadin offers always-on agentic swarms that chain vulnerabilities to test enterprise defenses.

• $255.5M Series B at a valuation above $2.5B
• Round led by Andreessen Horowitz and Accel
• Total funding now exceeds $445M in six months
• Product runs always-on agentic swarms instead of pen tests