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Proton Mail vs Mail.com: catalog facts
Proton Mail	Mail.com
Freemium Free accounts work in the mobile and web apps; the desktop apps are offered as a free…	Freemium Free accounts with ads; a premium tier is available.
Windows, macOS, Linux, Android, iOS, Web	Web, Browser extension
End-to-end encrypted email by default Apps for iOS, Android, macOS, Windows, Linux and the web	Choice of 100+ address domains Up to 10 addresses per account
Only works with a Proton account Desktop apps need a paid plan after the trial	Free tier shows sponsored content Proprietary hosted service
Downloadable app, Web application, Hosted service	Hosted service, Browser extension
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
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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