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Proton Drive vs Tresorit: catalog facts
Proton Drive	Tresorit
Freemium A free account is available, with paid plans for more storage and a separate business…	Paid A paid subscription is required.
Android, iOS, Web	Windows, macOS, Linux, Android, iOS, Web, Browser extension
End-to-end encryption that the provider cannot read Automatic photo and video backup from mobile	Zero-knowledge encryption combined with enterprise access controls and logging Choice of data residency within Europe
Requires a Proton account Free tier storage is limited	Expensive compared with mainstream storage, with no meaningful free tier Closed source
Downloadable app, Web application, Hosted service	Downloadable app, 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 22, 2026

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