Compare software

Microsoft 365LibreOffice Viewer
Freemium

Free web versions are available. Desktop apps require a paid subscription.

 Free

Free and open source under the MPL-2.0 licence.

Windows, macOS, Android, iOS, Web Android
  • The reference implementation of the formats everyone else has to match
  • Desktop, web and mobile apps with real-time co-authoring
  • Uses the same document engine as desktop LibreOffice
  • Does not share documents with third parties
  • Subscription pricing, with the desktop apps behind it
  • Closed source, and heavily tied to a Microsoft account
  • Simplified compared with the desktop suite
  • Focused on viewing rather than full editing
Downloadable app, Hosted service Downloadable app
Closed source Open source
License not stated License: MPL-2.0
Account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 2, 2026

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