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BorgBackupDisk ARchive (dar)
Free

Free and open source, with no paid edition.

 Free

Free; source code and static binaries are published.

Linux, macOS, Command line Linux, Command line
  • Content-defined chunking that survives files being renamed, moved or shifted around
  • Authenticated AES encryption, so an untrusted backup server only ever sees ciphertext
  • Differential and incremental backups alongside full archives
  • Built-in compression and encryption
  • 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
  • Command line only
  • Several parallel branches can make choosing a version confusing
Downloadable app Downloadable app
Open source Open source
License: BSD-2-Clause License not stated
No account needed No account needed
Works offline Works offline

Checked September 20, 2026

Checked September 24, 2026

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