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Windows (dockur) vs Virtual Machine Manager: catalog facts
Windows (dockur)	Virtual Machine Manager
Free The container is free; Windows licensing is the user's responsibility.	Free Free and open source under the GPL 2.0, maintained by Red Hat.
Linux, Self-hosted	Linux
Automatic Windows download and hands-free installation Near-native speed with KVM acceleration	The standard interface for KVM, so guides and answers are everywhere Command line tools for creating and editing machines without a desktop
Needs a host with KVM support for good performance Windows license terms still apply to the guest	Linux only The interface is functional and has barely changed in years
Self-hosted	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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