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SPICE vs Looking Glass: catalog facts
SPICE	Looking Glass
Free Free open source software.	Free Free and open source under the GPL 2.0 licence.
Linux	Windows, Linux
USB redirection and folder sharing with the guest Audio and video playback from the VM	Low-latency display and input for passthrough VMs No extra monitor, keyboard or mouse needed
Needs a hypervisor with SPICE support and guest tools installed Several separate components to set up	Requires a working GPU passthrough setup Needs a Linux host and a Windows guest
Downloadable app	Downloadable app
Open 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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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