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FabFilter Pro-C vs x42 plugins: catalog facts
FabFilter Pro-C	x42 plugins
Paid Paid plug-in with a 30-day trial.	Free Described as an open-source plugin collection; check the site for packaged builds.
Windows, macOS	Linux
14 compression styles plus saturation and character modes Clear visual display of gain reduction	Standards-based level meters (IEC, EBU) Zero-latency equalizer with spectrum analyzer
Requires a host DAW, it does not run on its own Commercial licence required after the trial	Requires an LV2 host or a JACK setup Site gives little release or platform detail
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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