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Gauntlet vs Kupfer: catalog facts
Gauntlet	Kupfer
Free Free and open source.	Free Free and open source under the GNU GPL.
macOS, Linux	Linux
Raycast-style launcher that is open source Plugins built with React	Object-and-action workflow like Quicksilver Extensible through plugins
Smaller plugin ecosystem than Raycast Writing plugins requires JavaScript and React knowledge	Linux only Slower development pace than newer launchers
Downloadable app	Downloadable app
Open 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 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.