# Rein Security Raises $25M Series A to Rein in Insecure AI Agents

On October 8, 2026, per Rein Security, AI agent security startup Rein Security raised $25 million in a Series A led by Glilot Capital and Sienna Venture Capital with Corner Ventures participating, bringing total funding to $35 million.



Canonical: https://uniquebase.ai/news/c4c38caa-24f0-4d69-ae32-e854d1255ee3
Stable identifier: c4c38caa-24f0-4d69-ae32-e854d1255ee3
Snapshot captured: 2026-10-20T18:19:32.670Z
English updated: 2026-10-20T18:21:32.462Z

## Connected profiles

- [Corner Ventures](/institutions/corner-ventures)
- [Glilot Capital](/institutions/glilot-capital)
- [Rein Security](/companies/rein-security)
- [Sienna Venture Capital](/institutions/sienna-venture-capital)

## Sources

- https://reinsec.io/blog/series-a/