Armadin
Palo Alto-based AI-native cybersecurity company that uses swarms of autonomous agents to find and validate exploitable attack paths.
- Industry
- cybersecurity, AI-powered offensive security
- Location
- Palo Alto, CA
About
Armadin is an AI-native cybersecurity company. Its platform deploys a swarm of specialized agents that act like a skilled adversary, chaining low-severity weaknesses into validated attack paths so that security teams can fix them. The company says it runs these campaigns in production for Fortune 500 enterprises and government customers.
Kevin Mandia, the founder of Mandiant, is CEO. The company says the Series B brought its total funding to $445 million.
An SEC Form D filed on 2026-10-15 reports $264,999,494 sold. The issuer address on that form is Menlo Park, California. The Series B announcement of 2026-10-01 was $255.5 million and was datelined Palo Alto. This page does not combine the two amounts, and it keeps the Palo Alto location taken from the Series B release. The form does not name the purchasers.
Funding history
| Round | Date | Amount | Lead |
|---|---|---|---|
| Form D 2026 | 2026-10-15 | $265M | |
| Series B 2026 | 2026-10-01 | $255.5M | Andreessen Horowitz, Accel |
Total funding reported by the sources: $445M.
Investors
- Andreessen Horowitz lead
- Accel lead
- Bain Capital Ventures participant
- Redpoint participant
- 8VC participant
- Ballistic Ventures participant
- Google Ventures participant
- In-Q-Tel participant
- Kleiner Perkins participant
- Menlo Ventures participant
Sources
Last verified:
- https://www.prnewswire.com/news-releases/armadin-raises-255-5-million-series-b-to-scale-effective-autonomous-security-302895278.html
Type: funding announcement. Accessed 2026-10-06.
PR Newswire release datelined Palo Alto, Calif., October 1, 2026. Source of the amount, the co-leads, all participants, the valuation of over $2.5 billion and total funding of $445 million. The Palo Alto location comes from this dateline. - https://techcrunch.com/2026/10/01/kevin-mandias-new-agent-swarm-security-startup-armadin-raises-255-5m-at-2-5b-valuation/
Type: reputable publication. Accessed 2026-10-06.
TechCrunch article dated 2026-10-01. Confirms the $255.5 million raise at a valuation of more than $2.5 billion and that Kevin Mandia leads the company. - https://a16z.com/announcement/investing-in-armadin/
Type: official investor website. Accessed 2026-10-06.
Andreessen Horowitz announcement dated 2026-10-01 describing its investment and the Armadin platform. - https://www.sec.gov/Archives/edgar/data/2094470/000209447026000002/0002094470-26-000002-index.htm
Type: sec filing. Accessed 2026-10-16.
SEC Form D for Armadin, Inc. EDGAR filing date 2026-10-15. Total amount sold $264,999,494 of an offering amount of $264,999,494. Issuer address city is Menlo Park, California. The form does not name the purchasers. This is not combined with the $255.5 million Series B announced on 2026-10-01. - https://buttondown.com/raisetrack/archive/raise-track-update-2026-10-16/
Type: other verified public source. Accessed 2026-10-16.
Raise Track Update for 2026-10-16, Section 3. Lists Armadin, state CALIFORNIA, industry Other Technology, amount raised $264,999,494.