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

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