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MailspringConvey
Freemium

The client is free and open source. Mailspring Pro is a monthly subscription that adds…

 Free

Free and open source under the LGPL 2.1 or later.

Windows, macOS, Linux Linux
  • Unified inbox, snooze, send later, rules and templates in the free tier
  • C++ sync engine keeps memory and battery use down for an Electron app
  • Conversation-centred view of email
  • Made for the GNOME desktop
  • Read receipts and link tracking are paid, and are tracking features
  • Electron, so still heavier than a native client
  • Very new project, started in 2026
  • Feature set is not documented in detail
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: LGPL-2.1-or-later
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked October 1, 2026

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