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Kopuz vs Tauon: catalog facts
Kopuz	Tauon
Free Free and open source under the EUPL-1.2, supported by sponsors.	Free Free and open source, supported by donations through GitHub Sponsors and Patreon.
Windows, macOS, Linux, Android	Linux
Local files and many music services in one library Synced and word-timed lyrics display	Wide codec support with CUE sheets and gapless playback Streams from Jellyfin and Airsonic servers
Apple Music playback only works on desktop Streaming sources need accounts with those services	Mainly aimed at Linux desktops Built around local files and self-hosted servers, not commercial streaming services
Downloadable app	Downloadable app
Open source	Open source
License: EUPL-1.2	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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