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Valhalla Supermassive vs Dragonfly Reverb: catalog facts
Valhalla Supermassive	Dragonfly Reverb
Free Free to download from Valhalla DSP.	Free Free and open source, with optional donations.
macOS	Windows, macOS, Linux
22 distinct reverb and delay modes Handles very long decays and repeating echoes	Several reverb types in one bundle Runs on Linux as well as macOS and Windows
Runs as a plugin inside other audio software, not on its own Aimed at large, ambient effects rather than subtle room sounds	Plugins only; needs a DAW or plugin host Maintained by a small team
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account 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.