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Qubes OS vs HardenedBSD: catalog facts
Qubes OS	HardenedBSD
Free The open-source system is available without a license fee.	Free Free and open source, supported by sponsors.
Linux	Command line
Compromise of one qube does not reach the others, by design Networking and USB are themselves isolated in dedicated qubes	Adds exploit mitigations on top of FreeBSD Signed installer images verifiable with base system tools
Demanding hardware requirements and a strict compatibility list Day-to-day use requires changing how you think about files and applications	Documentation on the homepage is sparse Aimed at users already comfortable with FreeBSD
Operating system	Operating system
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 23, 2026

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