Compare software

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