# Armadin raised $255.5M Series B led by a16z and Accel at a $2.5B valuation

Digest AI · Business & Funding · published 2026-10-01T11:40:02Z

Canonical: https://digestai.news/story/armadin-raised-255-5m-series-b-led-by-a16z-and-accel-at-a-2-5b-valuati

## Summary

Armadin, founded by Mandiant founder Kevin Mandia to build AI cybersecurity agents, announced on Thursday that it raised $255.5 million in a Series B funding round. The round was led by a16z and Accel and values the company at more than $2.5 billion. The funding supports the development of AI-powered cybersecurity tools.

## Key points

- Armadin raised $255.5 million in a Series B funding round
- The round was led by a16z and Accel
- The company is valued at more than $2.5 billion

## Why it matters

The large funding round shows strong investor confidence in AI-driven cybersecurity, signaling growth in the AI security tools market.

## Sources

1. [Armadin, started by Mandiant founder Kevin Mandia to build AI cybersecurity agents, raised a $255.5M Series B led by a16z and Accel at a $2.5B valuation](https://reuters.com/legal/transactional/ai-cybersecurity-startup-armadin-valued-over-25-billion-after-new-funding-round-2026-10-01) (reuters.com, 2026-10-01)

## Cite

Digest AI, "Armadin raised $255.5M Series B led by a16z and Accel at a $2.5B valuation", 1 October 2026, https://digestai.news/story/armadin-raised-255-5m-series-b-led-by-a16z-and-accel-at-a-2-5b-valuati

---

Written by Digest AI's editorial model from the linked sources; the sources are the record. Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse
JSON: https://digestai.news/story/armadin-raised-255-5m-series-b-led-by-a16z-and-accel-at-a-2-5b-valuati.json