Mandiant founder's new security startup Armadin raises $255.5M
Cybersecurity veteran Kevin Mandia's new startup Armadin has raised $255.5 million in a Series B round, reaching a valuation of more than $2.5 billion. The company builds AI agent systems that continuously test corporate cyber defenses.
Kevin Mandia, who previously founded cybersecurity firm Mandiant before selling it to Google for $5.4 billion in 2022, has secured a major new funding round for his latest venture, Armadin. The company announced on Thursday that it raised $255.5 million in a Series B round, valuing it at more than $2.5 billion.
The round was led by Andreessen Horowitz and Accel, with participation from Bain Capital Ventures, Redpoint, 8VC, Ballistic Ventures, Google Ventures, In-Q-Tel, Kleiner Perkins, and Menlo Ventures. This marks the second large funding round for Armadin within half a year — the company raised a $190 million Series A back in March. In total, Armadin has now raised more than $445 million.
A new approach to cyber defense
Armadin offers enterprises an alternative to traditional security testing. Typically, organizations hire human teams to simulate attacks and identify system weaknesses through so-called penetration tests. Instead, Armadin runs always-on swarms of AI agents that automatically chain together multiple vulnerabilities to breach systems.
The company's goal is to help organizations find and close security gaps before malicious actors — or even rogue AI agents potentially created by other AI labs — can exploit them.
