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Sublime Security Raises $150M Series C Led by Georgian to Scale Agentic AI Email Defenses
Series CB2B Growth

Sublime Security Raises $150M Series C Led by Georgian to Scale Agentic AI Email Defenses

•October 28, 2025
•Oct 28, 2025
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Participants

Sublime Security

Sublime Security

company

01A

01A

investor

Citibank

Citibank

investor

Avenir

Avenir

investor

IVP

IVP

investor

Index Ventures

Index Ventures

investor

Slow Ventures

Slow Ventures

investor

Why It Matters

By introducing industry‑first autonomous AI agents for email protection, Sublime could redefine threat detection speed and efficiency, pressuring legacy vendors and accelerating the shift toward AI‑driven cybersecurity solutions.

Deal Summary

Sublime Security announced a $150M Series C round led by Georgian, with participation from Avenir, 01A, Index Ventures, IVP, Citi Ventures, and Slow Ventures. The funding will accelerate the company’s agentic AI capabilities, expand its platform and global footprint.

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