Advanced hybrid wavetable synthesizer with flexible effects and a built-in sequencer.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026
Best Spire alternatives (2026)
The closest Spire alternatives are Serum 2, Vital, Surge XT, based on overlapping categories and operating systems. Spire is best for EDM leads, basses, and complex arpeggiated sequences and starts at $189 one-time.
Free spectral warping wavetable synth, the best-known free Serum alternative.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupportedFree, open-source hybrid synthesizer with extensive filters and a flexible modulation engine.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupported- FREE
Digital Suburban
Dexed
Free, open-source FM synthesizer plugin modeled closely on the Yamaha DX7.
VST3not supportedAUsupportedAAXnot supportedCLAPnot supportedWINsupportedMACsupportedLNXsupported - $499once
Spectrasonics
Omnisphere 3
Flagship Spectrasonics synthesizer combining multiple synthesis types in one instrument.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported Free Spitfire instrument plugin/library set, being sunset in favor of subscription-based Splice INSTRUMENT.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supportedSix-engine hybrid software synthesizer with modal, granular, wavetable, sample, harmonic and virtual analog synthesis.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported- €179once
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Diva
Analog-modeled virtual synthesizer emulating classic oscillator and filter circuits for vintage synth sound.
VST3supportedAUsupportedAAXsupportedCLAPsupportedWINsupportedMACsupportedLNXsupported - €99once
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Zebra2
Modular wireless synth with flexible routing, now sold as part of the Zebra Legacy bundle with ZebraHZ.
VST3supportedAUsupportedAAXsupportedCLAPsupportedWINsupportedMACsupportedLNXsupported - FREE
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TyrellN6
Free virtual analog synthesizer with classic dual-oscillator architecture and a Diva-derived filter.
VST3supportedAUsupportedAAXsupportedCLAPsupportedWINsupportedMACsupportedLNXsupported
Questions people ask
Serum 2 is the closest match: it is best for sound designers wanting deep wavetable synthesis and visual modulation and starts at $249 one-time.
Yes: Serum 2, Vital, Surge XT, Dexed, Spitfire LABS, Pigments, Diva, Zebra2, TyrellN6.