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Kupfer vs Ulauncher: catalog facts
Kupfer	Ulauncher
Free Free and open source under the GNU GPL.	Free Free and open source, with optional donations supporting development.
Linux	Linux
Object-and-action workflow like Quicksilver Extensible through plugins	Large extension ecosystem for adding custom functionality Fast, minimal interface focused on keyboard use
Linux only Slower development pace than newer launchers	Linux only, no macOS or Windows build Extension quality varies since they are community-maintained
Downloadable app	Downloadable app
Open source	Open source
License: GPL	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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