Free spectral warping wavetable synth, the best-known free Serum alternative.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupported
Checked September 2026
Best Cardinal alternatives (2026)
The closest Cardinal alternatives are Vital, Surge XT, Dexed, based on overlapping categories and operating systems. Cardinal is best for modular patching inside a DAW and starts at Free.
Free, 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 - €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 - €149once
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Hive 2
Streamlined, low-CPU synth with 2 oscillators, 140 wavetables, and a 12x2 mod matrix.
VST3supportedAUsupportedAAXsupportedCLAPsupportedWINsupportedMACsupportedLNXsupported - FREE
TheWaveWarden
Odin 2
Free open-source 24-voice polyphonic synth with custom waveform drawing and analog filter models.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupported - FREE
Matt Tytel
Helm
Free, open-source subtractive synth with polyphonic modulation; Matt Tytel's predecessor to Vital.
VST3not supportedAUsupportedAAXnot supportedCLAPnot supportedWINsupportedMACsupportedLNXsupported Free virtual analog synthesizer with a great sound and low CPU usage.
VST3supportedAUsupportedAAXsupportedCLAPsupportedWINsupportedMACsupportedLNXsupported
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Questions people ask
Vital is the closest match: it is best for producers who want Serum-style sound design for free and starts at Free (paid tiers add presets and wavetables).
Yes: Vital, Surge XT, Dexed, Diva, Zebra2, TyrellN6, Hive 2, Odin 2, Helm, TAL-NoiseMaker.