Kevin Mandia’s Armadin Raises $255.5M for AI Agent Security Platform

Cybersecurity startup Armadin raises $255.5 million at a valuation above $2.5 billion to expand its AI agent swarm platform for continuous security testing.

Shivangi Yadav

Oct 2, 2026 - 05:49

Kevin Mandia’s Armadin Raises $255.5M for AI Agent Security Platform

Image Credit: TechAmerica.ai / AI-generated image

Cybersecurity startup Armadin has raised $255.5 million in Series B funding at a valuation above $2.5 billion to expand its AI-powered approach to continuous security testing.

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. According to Armadin’s funding announcement, the company has now raised more than $445 million.

Armadin was founded by Kevin Mandia, who previously founded Mandiant, the cybersecurity company Google acquired for $5.4 billion in 2022.

The startup uses autonomous AI agent swarms to test enterprise systems for weaknesses continuously. Unlike traditional penetration tests conducted periodically by human teams, Armadin’s agents attempt to identify and chain together vulnerabilities on an ongoing basis.

The Series B comes six months after Armadin raised a $190 million Series A. The new funding will support further expansion of its autonomous security platform and operations.

Tags:

What's Your Reaction?

Like 0

Dislike 0

Love 0

Funny 0

Angry 0

Sad 0

Wow 0

Shivangi Yadav Shivangi Yadav is a technology writer at TechAmerica.ai, covering artificial intelligence, startups, digital platforms, consumer technology, mobility, and emerging technologies. Her reporting follows major developments across the global technology industry, from AI companies and startup funding to product launches, regulatory investigations, software platforms, and changes affecting large technology markets. At TechAmerica.ai, Shivangi looks beyond the initial announcement to understand what a development means in practice. Her coverage often examines how new technologies, regulatory decisions, and business moves could affect companies, consumers, and the wider industry. She writes for an international audience, focusing on clear, well-researched reporting that gives readers useful context on fast-moving technology stories.