Sublime Security announced on Tuesday that it has raised $150 million in a Series C funding round, which brings the total raised by the company to more than $240 million.
The Series C round was led by Georgian, with participation from Avenir, 01A, Index Ventures, IVP, Citi Ventures, and Slow Ventures. The new investment will fuel product development and the company’s global expansion.
The previous funding round, in which Sublime raised $60 million, was announced in December 2024.
Sublime Security has developed an agentic email security platform that leverages AI agents to analyze messages in search of threats. The platform uses a distributed detection model that conducts intent and behavioral analysis, along with deep content inspection.
The platform can also automate workflows. The Autonomous Security Agent (ASA) triages threats, while the Autonomous Detection Engineer (ADÉ) deploys tailored defenses to protect against new threats.
Sublime says its platform is already used by major companies such as Spotify, Snowflake, Zscaler, Anduril, Elastic, SentinelOne, and Compass.
“Our adversaries have constraints, like budgets and time, just like defenders do. AI is changing this dynamic, enabling more sophisticated attacks with less effort at scale,” said Josh Kamdjou, CEO and co-founder of Sublime.
“We built Sublime to stop this next generation of attacks by giving security teams an autonomous defense that detects, triages, and adapts at adversary speed, with the transparency and control that enhances work instead of creating friction,” Kamdjou added.
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