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KopiaDuplicacy
Free

Free and open source, with no paid edition.

 Freemium

The command-line version is free for personal use and its source is published. The…

Windows, macOS, Linux, Command line Windows, macOS, Linux
  • A desktop app and a command line tool that share the same repository format
  • End-to-end encryption with keys you control, plus compression and deduplication
  • Several machines can back up to one bucket and share deduplicated data with no server between them
  • Chunks are stored individually, so any storage with basic file operations works as a backend
  • Backs up the files and folders you choose; it is not a whole-disk imaging tool
  • Still pre-1.0, so repository format changes between versions are possible
  • Licence is not open source; commercial use and the web interface are paid
  • The free part is a command-line tool, so the friendly front end is the paid one
Downloadable app Downloadable app
Open source Closed source
License: Apache-2.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 20, 2026

Checked September 21, 2026

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