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bup vs Plakar: catalog facts
bup	Plakar
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	Linux, Self-hosted, Command line
Global deduplication across and within files Fast incremental saves	Encrypted, deduplicated snapshots Web interface for browsing and restoring backups
Command line only Development discussion happens on a mailing list rather than GitHub issues	Command-line oriented setup Younger project than established tools like restic or Borg
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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