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UnisonFreeFileSync
Free

The open-source application is available without a license fee.

 Free

Free to download and use; the project runs on advertising and donations. A paid Donation…

Windows, macOS, Linux Windows, macOS, Linux
  • Handles updates made independently on both replicas
  • Transfers only the differences between source and target instead of copying everything
  • Saved jobs run unattended in batch mode, suitable for scheduled backups
  • Conflicting edits may require a decision before synchronization.
  • The installer and the website carry advertising, and the download page pushes donations hard
  • Some conveniences, including parallel file copying, are reserved for the paid Donation Edition
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 20, 2026

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