Sublime Security

Sublime Security is an email security platform built around detection-as-code rules, with AI agents on top. It raised a $150 million Series C that closed in October 2025, led by Georgian with Avenir, 01A, Index Ventures, IVP, Citi Ventures and Slow Ventures participating. Total funding is reported as above $240 million, with one tracker at $252.3 million and CB Insights at $239.8 million, and valuation figures conflict, from about $923.4 million in one aggregator to a $100 million to $250 million range at Dealroom dated 2024. The company's blog says its Autonomous Security Analyst and Autonomous Detection Engineer, called ADÉ, are just the beginning, and I found no detail on how ADÉ is priced or packaged.

Pricing is unclear. Sublime's pricing page returned a rate-limit error when I tried to read it, so I could not verify anything directly, and the only description I found is a third-party profile calling it contract-based SaaS pricing. I found nothing confirming a free plan or any published price, so treat it as contact sales. That means a custom contract based on mailbox count and which agents and modules you use. A benefit of the detection-as-code approach is transparency, since teams can read and tune the rules, but it asks more of security engineers than a fully managed gateway.

Sublime suits security teams that want programmable, transparent email detection and AI-assisted analysis. Compare Abnormal AI, Material Security and Proofpoint. Browse the Cybersecurity tools directory for more.

Programmable email detection

Detection-as-code.

AI-assisted analysis and rule writing

ASA and ADÉ.

How much did Sublime raise?

$150M Series C in October 2025.

Pricing?

Contract-based; contact sales.

What is ADÉ?

Autonomous Detection Engineer.

Free plan?

Not confirmed.