Compare software

Comet Backup vs Retrospect Backup: catalog facts
Comet Backup	Retrospect Backup
Paid Commercial software with a free trial.	Paid Paid software with a free trial.
Windows, macOS, Linux, Self-hosted	Windows, macOS
Covers Windows, Linux, macOS, hypervisors and Microsoft 365 Choice of Comet cloud, any S3 service or your own storage	Runs on both Windows and Mac Ransomware detection built in
Aimed at businesses and MSPs rather than home users Pricing is not shown on the homepage	Paid software aimed largely at businesses No Linux edition mentioned
Downloadable app, Self-hosted, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
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 September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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