Armadin raises $255.5M to expand AI offensive security platform

Armadin has raised $255.5 million in Series B funding co-led by Andreessen Horowitz and Accel, valuing the company at over $2.5 billion. The startup runs autonomous agentic attack campaigns for Fortune 500 and government customers, chaining low-severity flaws into validated kill chains. Total funding now stands at $445 million.

• Series B of $255.5M values Armadin at over $2.5 billion
• Total funding reaches $445 million
• Platform chains low-severity flaws into validated kill chains
• Round co-led by a16z and Accel, with BCV and Redpoint joining