Compare software

Proton MailElectronMail
Freemium

Free accounts work in the mobile and web apps; the desktop apps are offered as a free…

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Windows, macOS, Linux, Android, iOS, Web Windows, macOS, Linux
  • End-to-end encrypted email by default
  • Apps for iOS, Android, macOS, Windows, Linux and the web
  • Adds desktop-oriented features around Proton Mail.
  • Only works with a Proton account
  • Desktop apps need a paid plan after the trial
  • Requires a Proton account and depends on an external mail service.
Downloadable app, Web application, Hosted service Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 22, 2026

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