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Quod Libet vs Cog: catalog facts
Quod Libet	Cog
Free The open-source application is available without a license fee.	Free Free and open source, supported by donations.
Windows, macOS, Linux	macOS
Flexible metadata searches and plugin support	Gapless playback and embedded CUE sheet support Plays a very broad range of formats, plus livestreams and HLS
Primarily designed around managing an audio library.	macOS only; the Windows and Linux version is still early Requires macOS 12 or later
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
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 24, 2026

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