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Tresorit vs Proton Drive: catalog facts
Tresorit	Proton Drive
Paid A paid subscription is required.	Freemium A free account is available, with paid plans for more storage and a separate business…
Windows, macOS, Linux, Android, iOS, Web, Browser extension	Android, iOS, Web
Zero-knowledge encryption combined with enterprise access controls and logging Choice of data residency within Europe	End-to-end encryption that the provider cannot read Automatic photo and video backup from mobile
Expensive compared with mainstream storage, with no meaningful free tier Closed source	Requires a Proton account Free tier storage is limited
Downloadable app, Hosted service, Browser extension	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 22, 2026	Official website Full listing and sources Checked September 23, 2026

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