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UrBackup vs Retrospect Backup: catalog facts
UrBackup	Retrospect Backup
Free The open-source software is available without a license fee. Hosting, hardware and…	Paid Paid software with a free trial.
Windows, macOS, Linux	Windows, macOS
Combines endpoint backup clients with centralized administration.	Runs on both Windows and Mac Ransomware detection built in
Requires installing and maintaining a backup server.	Paid software aimed largely at businesses No Linux edition mentioned
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is 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 September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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