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BorgBackupDuplicacy
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…

Linux, macOS, Command line Windows, macOS, Linux
  • Content-defined chunking that survives files being renamed, moved or shifted around
  • Authenticated AES encryption, so an untrusted backup server only ever sees ciphertext
  • 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
  • Primarily a Unix tool; on Windows it needs WSL or Cygwin rather than a native build
  • Borg 2 is still in beta, ships breaking changes between betas and should not hold production backups
  • 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: BSD-2-Clause 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.