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Sublime Security Raises $150M Series C to Expand Agentic AI Email Defense
Series CAIVenture Capital

Sublime Security Raises $150M Series C to Expand Agentic AI Email Defense

•October 28, 2025
•Oct 28, 2025
0

Participants

Sublime Security

Sublime Security

company

01A

01A

investor

IVP

IVP

investor

Slow Ventures

Slow Ventures

investor

Index Ventures

Index Ventures

investor

Avenir

Avenir

investor

Why It Matters

The funding fuels rapid scaling of autonomous email security, a segment under pressure from rising phishing and ransomware threats, and underscores investor confidence that AI‑driven defenses can outpace legacy solutions.

Deal Summary

Sublime Security announced a $150M Series C on 2025-10-28 led by Georgian to accelerate its agentic AI email security platform. New investors Avenir and 01A joined, alongside existing backers Index Ventures, IVP, Citi Ventures, and Slow Ventures.

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