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QNAP QuTS hero vs Asustor Data Master (ADM): catalog facts
QNAP QuTS hero	Asustor Data Master (ADM)
Freemium Included with supported QNAP NAS hardware; some features are paid add-ons.	Freemium Included with Asustor NAS hardware; some apps and services are paid add-ons.
Linux, Self-hosted	Linux, Self-hosted
ZFS foundation adds inline dedupe, compression, and stronger data integrity checks SnapSync replication supports disaster-recovery style workflows between units	App Central catalog covers backup, media server, and surveillance add-ons Btrfs snapshot support for point-in-time data protection
Only available on QNAP hardware certified for QuTS hero ZFS's memory appetite means it needs more RAM than QTS for the same workload	Only runs on Asustor's own hardware Smaller third-party app ecosystem than QNAP or Synology
Self-hosted	Self-hosted
Closed source	Closed source
License not stated	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 22, 2026

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