# Armadin raises $255.5 million Series B for AI cybersecurity agents

_Published Thursday, October 1, 2026 at 8:08 AM EDT · Capital, Security, AI · Latest · Tier 2 — Notable_

Armadin said Thursday it raised $255.5 million in a Series B round led by a16z and Accel, Reuters reported. The AI cybersecurity company, started by Mandiant founder Kevin Mandia to build cybersecurity agents, said the financing values it at more than $2.5 billion.

## Sources

- [Techmeme](https://www.techmeme.com/261001/p17#a261001p17)

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Canonical: https://techandbusiness.org/newswire/5z2eD-Csts2E4wbiE876y7
Published: 2026-10-01T12:08:16.971Z
Story chronology: 2026-10-01T11:40:02.000Z
Retrieved: 2026-10-01T14:03:18.518Z
Publisher: Tech & Business (techandbusiness.org)