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Xen Project vs SmartOS: catalog facts
Xen Project	SmartOS
Free Free and open source, developed under the Linux Foundation.	Free The SmartOS ISO is free and open source; Triton offers paid private and hosted cloud…
Self-hosted	Self-hosted
Type-1 hypervisor with strong isolation between guests Used in servers, embedded and safety-critical systems	Runs zones and KVM or bhyve VMs on the same host ZFS and DTrace built in
Installed on bare metal, so setup is more involved than desktop VM apps Aimed at infrastructure builders rather than casual users	Illumos base is less familiar than Linux Cloud management features require Triton on top
Downloadable app	Operating system
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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