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Proton Mail vs Yandex Mail: catalog facts
Proton Mail	Yandex Mail
Freemium Free accounts work in the mobile and web apps; the desktop apps are offered as a free…	Freemium Free mailbox, with paid Yandex Disk plans for extra storage.
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 mailbox with spam and virus filtering Filters, delayed sending and delivery reports
Only works with a Proton account Desktop apps need a paid plan after the trial	Closely tied to the wider Yandex 360 ecosystem Extra storage requires a paid Yandex Disk plan
Downloadable app, Web application, Hosted service	Downloadable app, 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
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.