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

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