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Sandstorm vs umbrelOS: catalog facts
Sandstorm	umbrelOS
Free Free and open source, self-hosted.	Free Free for personal and nonprofit use; Umbrel hardware is sold separately.
Self-hosted	Self-hosted
Per-app sandboxing limits the damage a compromised app can do Lets you self-host multiple web apps from one platform	One-click installs from an app store of over 300 apps Runs on PCs, Raspberry Pi 5 and virtual machines
Smaller and less actively developed than mainstream container platforms App ecosystem is more limited than general-purpose container registries	Source-available licence, not open source Commercial use is not covered by the free licence
Self-hosted	Operating system
Open source	Closed source
License not stated	License: PolyForm-Noncommercial-1.0.0
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 23, 2026

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