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csync2 vs rsync: catalog facts
csync2	rsync
Free Free and open source.	Free Free and open source under the GPL.
Linux, Command line	Windows, macOS, Linux, Command line
Synchronizes files across many hosts at once Tracks file state in a database to detect conflicts	Transfers only the changed parts of files, so repeat syncs are fast Preserves permissions, links and attributes, which makes it safe for system trees
Aimed at server clusters, not desktop users Command-line and config file only	No versioning or snapshots on its own; --delete destroys without warning Command-line only, with a long list of subtle flags
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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