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Proton Drive vs Sia: catalog facts
Proton Drive	Sia
Freemium A free account is available, with paid plans for more storage and a separate business…	Freemium The Sia Storage app includes 50 GB free; pricing beyond that is not stated.
Android, iOS, Web	Android, iOS
End-to-end encryption that the provider cannot read Automatic photo and video backup from mobile	Files encrypted and sharded across many independent hosts No central operator holding your data
Requires a Proton account Free tier storage is limited	Mostly aimed at a technical and builder community Desktop clients and pricing details are not described on the homepage
Downloadable app, Web application, Hosted service	Downloadable app, Hosted service
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is 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 October 1, 2026

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