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Rockstor vs Asustor Data Master (ADM): catalog facts
Rockstor	Asustor Data Master (ADM)
Free Open source; the project also offers commercial support options.	Freemium Included with Asustor NAS hardware; some apps and services are paid add-ons.
Linux, Self-hosted	Linux, Self-hosted
Multi-arch and Btrfs-based, giving snapshot and replication features without proprietary lock-in Application framework lets users extend the NAS with additional services	App Central catalog covers backup, media server, and surveillance add-ons Btrfs snapshot support for point-in-time data protection
Smaller community and plugin ecosystem than TrueNAS or OpenMediaVault Btrfs still requires more care around RAID levels than mature ZFS setups	Only runs on Asustor's own hardware Smaller third-party app ecosystem than QNAP or Synology
Self-hosted, Downloadable app	Self-hosted
Open 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.