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Proton Mail vs Tuta Mail: catalog facts
Proton Mail	Tuta Mail
Freemium Free accounts work in the mobile and web apps; the desktop apps are offered as a free…	Freemium A free plan is available, with paid plans that support custom domains.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS, Web
End-to-end encrypted email by default Apps for iOS, Android, macOS, Windows, Linux and the web	End-to-end encrypted email Includes calendar and contacts
Only works with a Proton account Desktop apps need a paid plan after the trial	Requires a Tuta account Custom domain support is part of paid plans
Downloadable app, Web application, Hosted service	Downloadable app, Web application, Hosted service
Closed source	Open source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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