Sublime Security
Stop advanced email attacks before they reach users.
Washington, United States · Founded 2021 · $239.8M raised
- Headquarters
- Washington, District of Columbia
- Employees
- 51–200
- Founded
- 2021
- Business Model
- B2B
- Website
- sublime.security
- Total Funding
- $239.8M
- Last Round
- $150.0M Series COct 2025
- Rounds
- 4
About
Sublime Security is a next-generation email security platform that uses autonomous AI agents to detect, adapt, and respond to advanced threats — including BEC, phishing, malware, and QR code attacks — in hours rather than days. Security teams gain full visibility, a detection-as-code rule engine, and an open-source threat intelligence layer to hunt and stop attacks before they reach users.
Summary
Sublime Security is an Artificial Intelligence company based in Washington, United States, founded in 2021. It has raised $239.8M in total across 4 rounds, most recently a $150.0M Series C round in Oct 2025. Investors include Index Ventures and BoxGroup.
Tech & App Stack
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Funding History
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Oct 2025
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Seed through Series C — per-round amounts, valuations, and who invested in each round.
Investors
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