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rsync vs ChronoSync: catalog facts
rsync	ChronoSync
Free Free and open source under the GPL.	Paid $49.99 with a 15-day trial; a cheaper Express edition is on the App Store and Setapp.
Windows, macOS, Linux, Command line	macOS
Transfers only the changed parts of files, so repeat syncs are fast Preserves permissions, links and attributes, which makes it safe for system trees	Syncs to drives, NAS, other Macs and selected cloud services Can create bootable backups
No versioning or snapshots on its own; --delete destroys without warning Command-line only, with a long list of subtle flags	macOS only Paid license, with ChronoAgent sold separately
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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.