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fre:ac vs Audex: catalog facts
fre:ac	Audex
Free Free to use; the project accepts donations.	Free Free and open source under the GPL-2.0 licence.
Windows, macOS, Linux	Linux
Wide range of input and output formats Converts whole libraries and keeps folder structure	CDDB and MusicBrainz metadata lookup Fetches cover art automatically
Releases are infrequent Interface is functional rather than modern	Linux only Needs a physical CD drive
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Works offline	Not stated if it 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.