Free, open-source hybrid synthesizer with extensive filters and a flexible modulation engine.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupported
Checked September 2026
Surge XT vs Omnisphere 3 (2026)
Surge XT is best for budget-conscious producers wanting a fully free, open-source synth with pro-level features; Omnisphere 3 is best for sound designers and composers wanting a massive, flagship-tier synth library and engine. Surge XT starts at Free and Omnisphere 3 at $499 one-time.
Spectrasonics
Omnisphere 3
Flagship Spectrasonics synthesizer combining multiple synthesis types in one instrument.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
| Surge XT | Omnisphere 3 | |
|---|---|---|
| Best for | budget-conscious producers wanting a fully free, open-source synth with pro-level features | sound designers and composers wanting a massive, flagship-tier synth library and engine |
| Starting price | Free | $499 one-time |
| Free version | Yes | No |
| Free trial | — | — |
| Formats | VST3, AU, CLAP, LV2, Standalone | Standalone, VST3, VST2, AU, AAX |
| OS | Windows, macOS, Linux | Windows, macOS |
| Key features | Hybrid synthesis engine, Extensive filter selection, Flexible modulation matrix, MPE and microtuning support, Open Sound Control support | Hybrid synthesis (sample + granular + FM), Massive built-in sound library, Hardware/software integration, Extensive modulation and effects |
| Developer | Surge Synth Team | Spectrasonics |
Questions people ask
Surge XT starts at Free; Omnisphere 3 starts at $499 one-time.
Hybrid synthesis engine, Extensive filter selection, Flexible modulation matrix, MPE and microtuning support, Open Sound Control support.
Hybrid synthesis (sample + granular + FM), Massive built-in sound library, Hardware/software integration, Extensive modulation and effects.