It’s been a big year for us here at Sublime. We shipped amazing product like email bomb protection and topic modeling, built AI agents that autonomously triage user reports and auto-adapt coverage, and have grown our team of amazing humans. We’ve grown our customer base 4x since the beginning of the year while maintaining zero enterprise customer churn since company inception. This momentum has led us to today.
We’re excited to announce that we’ve raised $150M in Series C funding to accelerate our vision for an agentic future for email security. The round was led by Georgian, with participation from new investors Avenir, 01A, Jon Oberheide, and Nicole Perlroth, and existing investors Index Ventures, IVP, Citi Ventures, and Slow Ventures.
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What this funding enables
Our adversaries often operate like businesses with objectives and resource constraints. Historically these constraints consisted of things like time and skill. With AI, these constraints are gone, enabling more sophisticated, varied, and targeted attacks with less time and skill and higher returns.
We built Sublime to stop this next generation of attacks and fight fire with fire. Our Autonomous Security Analyst (ASA) and Autonomous Detection Engineer (ADÉ) are just the beginning. This funding accelerates our ability to apply the same agentic principles across our platform and deliver more value for our customers.
We’re doubling down on what makes Sublime different: email protection that autonomously adapts to each organization’s unique environment and evolving threats, with the transparency and control that enhances work instead of creating friction. This means continued investment in platform capabilities that prevent more sophisticated attacks, reduce manual work, and eliminate the vendor bottlenecks of traditional solutions. We’re also expanding our global footprint to maximize the impact we have and support customers and partners wherever they operate.
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