Effect / Soundtheory
Gullfoss
8.7Great
Gullfoss is an intelligent equalizer that uses a computational auditory perception model to improve a mix's clarity, detail, spatiality, and balance.
Plugin comparison
Gullfoss vs iZotope Ozone 11
Specs, price and the Dubspot Score, side by side — with our verdict on which effect to buy.
Independent score / workflow fit / buying signal
Contenders
The side-by-side
Effect / iZotope
iZotope Ozone 11
8.4Great
iZotope Ozone 11 is a mastering plugin suite, offered in Elements, Standard, and Advanced editions, with AI-assisted Master Assistant workflows.
Score verdict
Which should you buy?
On the Dubspot Score, Gullfoss comes out ahead (8.7). That said, the right pick depends on your workflow and budget — read both reviews before deciding.
Technical matrix
Specs compared
| Signal | Gullfoss | iZotope Ozone 11 |
|---|---|---|
| Price | — | — |
| Dubspot Score | 8.7 | 8.4 |
| Formats | AU, VST, VST3, AAX Native | VST3, AU, AAX |
| Official price | EUR 178.00 (no USD price listed on the official store) | — |
| Editions | Gullfoss, Gullfoss Live, Gullfoss Master (share one installer) | Elements, Standard, Advanced |
| Processing latency | ~20ms (Gullfoss & Gullfoss Master); ~2ms (Gullfoss Live) | — |
| Sample rates | 16 kHz to 384 kHz | — |
| Channels | Mono-to-mono or stereo-to-stereo (stereo compatible with M/S) | — |
| EQ update rate | ~300 equalizer updates per second; ~1000 auditory model updates per second | — |
| System requirements | macOS 10.9+ / Windows 7+, 64-bit host, OpenGL 3.2+; iLok License Manager for activation (no dongle required) | — |
| Plugin formats | — | AAX, AU, VST3 (64-bit only; VST2 not supported) |
| New modules (Advanced) | — | Clarity, Stem Focus, Transient/Sustain, Upward Compress |
| Master Assistant | — | AI-powered assistant with Assistive Vocal Balance vocal checker |
| Standard modules | — | Maximizer, Imager, Match EQ, Dynamics, EQ, Exciter, Vintage |
| Apple silicon | — | Native Apple silicon (M-series) and Intel Mac support |
See the full plugin database for more comparisons.