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Kupfer vs Onagre: catalog facts
Kupfer	Onagre
Free Free and open source under the GNU GPL.	Free Free and open source.
Linux	Linux
Object-and-action workflow like Quicksilver Extensible through plugins	Works on both X11 and Wayland Extensible through pop-launcher plugins
Linux only Slower development pace than newer launchers	Depends on pop-launcher being installed Linux only
Downloadable app	Downloadable app
Open source	Open source
License: GPL	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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