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Walker vs Kupfer: catalog facts
Walker	Kupfer
Free Free to download and build from the public repository.	Free Free and open source under the GNU GPL.
Linux	Linux
Launches apps, runs commands and calculates from one prompt Native GTK4 interface	Object-and-action workflow like Quicksilver Extensible through plugins
Linux only Many options to configure before it fits your setup	Linux only Slower development pace than newer launchers
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL
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 23, 2026

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