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bup vs restic: catalog facts
bup	restic
Free Free and open source.	Free Free and open source, with no paid edition.
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Global deduplication across and within files Fast incremental saves	One static binary with no server, agent or database to install first Content-defined chunking means daily backups only transfer what changed
Command line only Development discussion happens on a mailing list rather than GitHub issues	Command line only; any graphical interface or scheduling comes from third-party projects Still pre-1.0, so the project does not yet guarantee backward compatibility across major versions
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License: BSD-2-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 20, 2026

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