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