Sublime Security is an email security platform built around an open, provider-agnostic detection-as-code model: anyone can write, run, and share rules in a domain-specific language to block phishing, BEC, and other email attacks. Its detection rules and message schema are open and community-driven (the sublime-rules repo), and teams can self-host a free instance via Docker or cloud-native deploy. Sublime also offers paid managed SaaS and Enterprise editions for teams wanting a hosted, team-managed instance. The open rules are MIT/open, but the managed commercial platform is not OSI-licensed.
email-securitydetection-as-codeopen-rulesapi-based
Overview
- Founded
- 2020
- Pricing tier
- Mid
- Startup-friendly
- Yes
- Enterprise-ready
- Yes
Email security
- Anti-phishing
- Yes
- Anti-malware
- Yes
- BEC protection
- Yes
- DLP
- No
- API-based
- Yes
- Secure gateway
- No
- Open-source
- No
- Free tier
- Yes: Free self-hosted/self-managed edition (Docker or cloud-native deploy); paid managed SaaS and Enterprise tiers above. Detection rules and DSL are open (MIT), but the managed platform is not OSI-licensed.