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Synology Active Backup for Business vs Comet Backup: catalog facts
Synology Active Backup for Business	Comet Backup
Free License-free package, but it requires a compatible Synology NAS.	Paid Commercial software with a free trial.
Windows, macOS, Self-hosted	Windows, macOS, Linux, Self-hosted
Bare-metal recovery with bootable USB or ISO media Global deduplication across all backed-up machines	Covers Windows, Linux, macOS, hypervisors and Microsoft 365 Choice of Comet cloud, any S3 service or your own storage
Only runs on Synology NAS hardware Aimed at business environments rather than casual users	Aimed at businesses and MSPs rather than home users Pricing is not shown on the homepage
Downloadable app, Self-hosted	Downloadable app, Self-hosted, Hosted service
Closed source	Closed source
License: Proprietary	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 23, 2026	Official website Full listing and sources Checked September 24, 2026

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