Armadin
Armadin is an Email, AppSec & GRC company founded in 2025 and based in Palo Alto, United States. It has raised $445M in total funding, most recently a Series B in 2026 at a $2.5B valuation.
Armadin was founded in 2025 by Kevin Mandia, the founder of Mandiant, who serves as CEO, with Travis Lanham, Evan Peña and David Slater, and is based in Palo Alto, California. It builds an agentic attacker swarm: specialized AI agents running custom models that discover, exploit and chain vulnerabilities across external, internal, identity, cloud and application attack surfaces, running continuously against live production environments. Armadin positions the platform as an alternative to periodic penetration tests and sells it to enterprises and to state, local and education government agencies, converting pilot programs into multi-year agreements. It launched publicly on March 10, 2026 with $189.9 million in combined seed and Series A funding led by Accel. On Oct. 1, 2026 it raised a $255.5 million Series B led by Andreessen Horowitz and Accel at a valuation above $2.5 billion, bringing total funding past $445 million.
Armadin applies AI agents to offensive security, replacing the annual penetration test with continuous automated attacks that prove which weaknesses can be exploited. Mandia sold Mandiant to Google for $5.4 billion in 2022, and his co-founders came from Google Cloud Security, Mandiant and Google SecOps. Its two 2026 rounds, $189.9 million in March and $255.5 million in October, drew Andreessen Horowitz, Accel, GV, Kleiner Perkins and In-Q-Tel. Armadin says one engagement produced more than 17 million offensive actions in three days and validated 38 attack paths.
At a glance
Total raised
$445M
Headcount
—
Headquarters
Palo Alto
United StatesFounded
2025
Status
Private
Latest valuation
Where Armadin ranks
Top 25 Cybersecurity companies →Funding history
Total raised
$445M
Rounds tracked
1
Latest stage
Series B
Latest valuation
$2.5B
| Date | Stage | Amount | Valuation | Lead investors |
|---|---|---|---|---|
| Oct 1, 2026 | Series B | $255.5M | $2.5B | Andreessen Horowitz, Accel |