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

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