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
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
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
13 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
Create a free account with 25 free credits every month, no card needed, to unlock the full tech & app stack, funding history, and valuations.
Funding History
Oct 2025
Sign up to see all 4 events
Funding: Seed through Series C. Amounts, valuations, and investors where available.
Investors
Similar Companies
Palantir Technologies builds data integration and analytics platforms (Gotham and Foundry) for go...
Cyera provides an AI-powered data security platform that helps security teams discover, control, ...
Real-time AI platform that detects early signs of high-impact events and emerging risks from publ...
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artifi...
Appears in
Your company? Embed this profile
Add the live badge to your site — it stays current as your funding data updates.
<a href="https://indexed.vc/companies/sublime-security"><img src="https://indexed.vc/api/badge/company/sublime-security" alt="Sublime Security on Indexed.vc" width="260" height="76" /></a>