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FabFilter Pro-R vs Valhalla Supermassive: catalog facts
FabFilter Pro-R	Valhalla Supermassive
Paid Paid plug-in with a 30-day trial.	Free Free to download from Valhalla DSP.
Windows, macOS	macOS
Musical controls instead of technical reverb parameters Stepless Space control across many room models	22 distinct reverb and delay modes Handles very long decays and repeating echoes
Paid after the trial Needs a host DAW; it is not a standalone app	Runs as a plugin inside other audio software, not on its own Aimed at large, ambient effects rather than subtle room sounds
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
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.