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Sublime Security
Agentic email security with open detection rules and AI that writes new coverage in hours.
Proof of life. Raised $150M Series C led by Georgian, October 2025
Sublime sits on Microsoft 365 and Google Workspace via API and lets detection engineers inspect, fork, and publish rules instead of trusting a black box. Two agents now do the parts vendors used to sit on: one triages inbound mail, the other authors new detections when a novel lure shows up. The bet is that email defense has to ship like a detection shop, not a quarterly content pack.
- Category
- Email and collaboration
- Headquarters
- Washington, United States
- Country
- United States
- Founded
- 2019
- Funding stage
- Series C
- Total funding
- $244M
- Website
- https://sublime.security
Investors
GeorgianIndex VenturesIVPCiti Ventures
Tags
Series CUnited States
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