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BlueMailMailspring
Freemium

The client is free to download. Some features are reserved for paid plans.

 Freemium

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

Windows, macOS, Linux, iOS Windows, macOS, Linux
  • One inbox covers many accounts across Windows, macOS, Linux, Android and iOS with a consistent interface and shared…
  • 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
  • It is closed source, some features need a paid plan, and its handling of account credentials has drawn…
  • Read receipts and link tracking are paid, and are tracking features
  • Electron, so still heavier than a native client
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 21, 2026

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