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