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Dragonfly Reverb vs Valhalla Supermassive: catalog facts
Dragonfly Reverb	Valhalla Supermassive
Free Free and open source, with optional donations.	Free Free to download from Valhalla DSP.
Windows, macOS, Linux	macOS
Several reverb types in one bundle Runs on Linux as well as macOS and Windows	22 distinct reverb and delay modes Handles very long decays and repeating echoes
Plugins only; needs a DAW or plugin host Maintained by a small team	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
Open source	Closed source
License not stated	License not stated
No account 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.