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FabFilter Pro-Q vs TDR VOS SlickEQ: catalog facts
FabFilter Pro-Q	TDR VOS SlickEQ
Paid Requires a paid license or subscription. Trial availability and licensing depend on the…	Free The standard plug-in is available as a free download.
Windows, macOS	Windows, macOS
Provides an interactive equalizer display Supports common professional audio plug-in formats	Four EQ models with optional non-linearity Stereo sum and difference processing
Requires a compatible audio host and a paid license.	Requires a compatible audio plug-in host
Downloadable app	Downloadable app
Closed source	Closed 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	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 8, 2026

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