Armadin is an AI-native cybersecurity startup founded in 2026 by Kevin Mandia, the founder of Mandiant, and headquartered in the United States. It launched publicly in early 2026 and raised $189.9 million in a combined seed and Series A round led by Accel, with participation from the CIA's venture arm, In-Q-Tel. The company is built around the thesis that AI-agent cyberattacks are imminent and that defense must itself be AI-native and autonomous in response.
| Founder/CEO | Kevin Mandia |
| Founded | 2026 |
| HQ country | US |
| Company type | Cybersecurity |
| Lead investor | Accel |
Overview and thesis
Armadin was founded by Kevin Mandia, who previously founded Mandiant and sold it to Google in 2022 for $5.4 billion. The company's stated thesis is that AI-agent cyberattacks are imminent and that defense must be AI-native and autonomous in response. It was founded following Mandia's May 2025 RSA Conference warning that AI-agent cyberattacks would occur within a year (Source: Raw Sources/Mandia - AI Agent Cyberattacks Warning 2025.md).
Armadin launches into competition with Mandiant, Mandia's previous company, now part of Google Cloud Security, as well as Microsoft's MSTIC/Hacker Hunters unit, Palo Alto Networks, CrowdStrike, and newer AI-native entrants.
Funding and investors
Armadin raised $189.9 million in a combined seed and Series A round in February and March 2026, led by Accel. Participating investors included GV (Google Ventures), Kleiner Perkins, Menlo Ventures, 8VC, Ballistic Ventures, and In-Q-Tel, the CIA's venture arm.
The participation of In-Q-Tel positions Armadin within the US intelligence community's approach to AI-defensive capability. The combination of Accel, a Silicon Valley venture firm, and In-Q-Tel, the intelligence community's venture arm, reflects a dual-market positioning spanning commercial and US-government customers.
| Investor | Role |
|---|---|
| Accel | Lead |
| GV (Google Ventures) | Participating |
| Kleiner Perkins | Participating |
| Menlo Ventures | Participating |
| 8VC | Participating |
| Ballistic Ventures | Participating |
| In-Q-Tel (CIA venture arm) | Participating |
Relationships
- founded-by: Kevin Mandia
- predecessor: Mandiant
- related: (Source: Raw Sources/Mandia - AI Agent Cyberattacks Warning 2025.md), Goldilock — AI-Powered Malware 2025 Threat Forecast, planned AI and Cybersecurity, (Source: nytimes.com) (cybersecurity-AI ecosystem).
Sources
- TechCrunch / Mandiant's founder just raised $190M for his autonomous AI agent security startup (2026-03-10)
- Analytics Insight / Mandia Raises $189.9M for Armadin Security Startup
- WebProNews / Mandia's Armadin Bets Big on AI Defense as Hackers Weaponize Code