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Proton Drive vs Filen: catalog facts
Proton Drive	Filen
Freemium A free account is available, with paid plans for more storage and a separate business…	Freemium A free tier is available. More storage requires a paid plan or a lifetime purchase.
Android, iOS, Web	Windows, macOS, Linux, Android, iOS, Web
End-to-end encryption that the provider cannot read Automatic photo and video backup from mobile	Client applications are open source and the encryption is zero-knowledge Data stored in Germany under EU data protection rules
Requires a Proton account Free tier storage is limited	Smaller and newer than the established providers Some clients still carry rough edges
Downloadable app, Web application, Hosted service	Downloadable app, Hosted service
Closed source	Open 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.