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AerionGeary
Free

Free and open source under the Apache 2.0 licence.

 Free

The software is free under its open-source licence. Hosting, hardware and external…

Windows, macOS, Linux Linux
  • Built with Wails instead of Electron for lower resource use
  • Direct IMAP and SMTP connection with mail stored locally
  • Related messages collapse into conversations and full-text search is fast, which makes it pleasant for straightforward…
  • Young project with a smaller feature set than established clients
  • Tracking protection is described as basic
  • It is Linux-only and deliberately minimal, with no built-in encryption, rules engine or calendar.
Downloadable app Downloadable app
Open source Open source
License: Apache-2.0 License: LGPL-2.1
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 22, 2026

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