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rsnapshot vs bup: catalog facts
rsnapshot	bup
Free Free and open source under the GPL.	Free Free and open source.
macOS, Linux, Command line	macOS, Linux, Command line
Every snapshot is a browsable directory, so restoring is just copying a file Hard links make dozens of retained snapshots cheap in disk space	Global deduplication across and within files Fast incremental saves
No encryption or compression of its own Hard links mean the backup destination must be a filesystem that supports them	Command line only Development discussion happens on a mailing list rather than GitHub issues
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: LGPL-2.1
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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