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