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Houston UI vs Rockstor: catalog facts
Houston UI	Rockstor
Free Free and open source.	Free Open source; the project also offers commercial support options.
Linux, Web, Self-hosted	Linux, Self-hosted
Built on the widely used Cockpit framework rather than a proprietary UI stack Open source, so the management layer can be inspected or extended	Multi-arch and Btrfs-based, giving snapshot and replication features without proprietary lock-in Application framework lets users extend the NAS with additional services
Primarily developed and tested around 45Drives' own hardware lineup Smaller plugin ecosystem than mainstream NAS OSes like OpenMediaVault	Smaller community and plugin ecosystem than TrueNAS or OpenMediaVault Btrfs still requires more care around RAID levels than mature ZFS setups
Self-hosted, Web application	Self-hosted, Downloadable app
Open source	Open 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.