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Proton Mail vs Yahoo Mail: catalog facts
Proton Mail	Yahoo Mail
Freemium Free accounts work in the mobile and web apps; the desktop apps are offered as a free…	Free Free email service from Yahoo.
Windows, macOS, Linux, Android, iOS, Web	Android, iOS, Web
End-to-end encrypted email by default Apps for iOS, Android, macOS, Windows, Linux and the web	Free email account Available on the web and on phones
Only works with a Proton account Desktop apps need a paid plan after the trial	Closed service run by a large advertising company Hosted only, no self-hosting option
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	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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