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ElectronMailTuta Desktop
Free

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

 Freemium

A free account with limited storage and one address. Paid plans add custom domains…

Windows, macOS, Linux Windows, macOS, Linux
  • Adds desktop-oriented features around Proton Mail.
  • End-to-end encrypts mail bodies, subject lines, calendar and contacts
  • Password-protected messages to recipients who are not Tuta users
  • Requires a Proton account and depends on an external mail service.
  • No IMAP or SMTP, so third-party mail clients cannot be used
  • A Tuta account is required; it is not a general mail client
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-3.0
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked September 21, 2026

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