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SongKong vs MusicBrainz Picard: catalog facts
SongKong	MusicBrainz Picard
Paid Free to preview changes and run a status report; applying fixes requires a paid licence.	Free Free and open source under the GPL, maintained by the non-profit MetaBrainz Foundation.
macOS	Windows, macOS, Linux
Fixes entire collections automatically instead of album by album Preview mode shows changes before anything is modified	AcoustID fingerprinting identifies files from the audio itself, even with no tags at all Album-oriented matching produces consistent tags across a whole release
Applying changes requires a paid licence Relies on online databases for identification	Needs an internet connection; it is a front end to an online database The album-first workflow is awkward for loose singles and compilations
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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