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MailpitMailHog
Free

Free to download and run.

 Free

Free and open source under the MIT licence.

Web, Self-hosted, Command line Windows, macOS, Linux, Self-hosted, Command line
  • Single binary or Docker image with no dependencies
  • HTML compatibility, link and spam checks built in
  • Single Go binary that runs without installation
  • Web UI and API for inspecting captured mail
  • For testing only, not a real mail client
  • Spam scoring relies on a SpamAssassin setup
  • Little development activity; last commit in early 2024
  • Intended for testing, not for delivering production mail
Downloadable app, Self-hosted Downloadable app, Self-hosted
Open source Open source
License not stated License: MIT
No account needed No account needed
Works offline Works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.