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Proton DriveMicrosoft OneDrive
Freemium

A free account is available, with paid plans for more storage and a separate business…

 Freemium

A small free tier is available. More storage comes with paid Microsoft 365 plans.

Android, iOS, Web Windows, macOS, Android, iOS, Web
  • End-to-end encryption that the provider cannot read
  • Automatic photo and video backup from mobile
  • Deeply integrated into Windows and Office, including Files On-Demand
  • Storage is included with a Microsoft 365 subscription
  • Requires a Proton account
  • Free tier storage is limited
  • Only 5 GB free, and it inserts itself into Windows folders aggressively
  • No Linux client from Microsoft
Downloadable app, Web application, Hosted service Downloadable app, 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

Checked September 23, 2026

Checked September 22, 2026

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