Sublime Security, the developer of an AI-native email security platform, announced a $150 million Series C round led by Georgian, with participation from Avenir, 01A, Index Ventures, IVP, Citi Ventures, and Slow Ventures.
The funding comes less than a year after its Series B round and will be used to expand Sublime’s agentic AI capabilities, advance product innovation, and grow its global presence. Sublime’s AI agents autonomously detect, triage, and respond to emerging threats in real time—reducing the burden on security teams while improving detection speed and accuracy.
The company’s Autonomous Security Analyst (ASA) and Autonomous Detection Engineer (ADÉ) have driven 100% annual recurring revenue growth in 2025, earning adoption from major enterprises including Spotify, Snowflake, Zscaler, and SentinelOne.
KEY QUOTES:
“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. 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.”
Josh Kamdjou, Co-founder and Chief Executive Officer, Sublime Security
“We believe that Sublime’s use of agentic AI to counter adversaries is redefining how organizations defend themselves—with more context, precision, speed, and transparency than has been possible before.”
Russell Moore, Partner, Georgian
“Sublime continues to push the boundary of what we think is possible in email security. They are a true industry disruptor, and as they continue to develop new agentic AI capabilities, legacy solutions will struggle to keep pace.”
Dmitri Alperovitch, Co-founder and Former CTO, CrowdStrike; Early Investor, Sublime Security
“What makes the biggest difference is that we’re catching more threats with far less manual work. For a team like ours, having an autonomous platform that adapts to new threats is invaluable.”
Indu Sajeev, Chief Information Security Officer, ASOS
