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ConveyMailspring
Free

Free and open source under the LGPL 2.1 or later.

 Freemium

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

Linux Windows, macOS, Linux
  • Conversation-centred view of email
  • Made for the GNOME desktop
  • 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
  • Very new project, started in 2026
  • Feature set is not documented in detail
  • Read receipts and link tracking are paid, and are tracking features
  • Electron, so still heavier than a native client
Downloadable app Downloadable app
Open source Open source
License: LGPL-2.1-or-later License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

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