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Proton MailRunbox
Freemium

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

 Paid

Paid subscription after a free 30-day trial.

Windows, macOS, Linux, Android, iOS, Web Web
  • End-to-end encrypted email by default
  • Apps for iOS, Android, macOS, Windows, Linux and the web
  • Data hosted in Norway under Norwegian privacy law and GDPR
  • No advertising
  • Only works with a Proton account
  • Desktop apps need a paid plan after the trial
  • No free plan after the trial
  • Hosted service, so you rely on the provider for your mail
Downloadable app, Web application, Hosted service Web application, Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

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