Alternatives to VCV Rack
A virtual Eurorack modular synthesizer for Windows, macOS and Linux with a large module library. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
VCV Rack
A virtual Eurorack modular synthesizer for Windows, macOS and Linux with a large module library.
Replacements
Listings that take over the same core job as VCV Rack.
Cardinal
Free, self-contained virtual modular synthesizer based on VCV Rack, as a plugin and standalone app.
Cardinal is a free open-source rebuild based on VCV Rack with 1382 built-in modules and plugin formats, but it cannot load external Rack modules.
SunVox
A small modular synthesizer with a pattern-based tracker sequencer for desktop and mobile.
SunVox combines a small modular synthesizer with a tracker sequencer and adds Android and iOS versions, but it is closed source.
Pure Data
Open-source visual programming environment for building interactive audio and multimedia works.
Pure Data is a free open-source visual patching environment for real-time audio, built from general processing objects rather than Eurorack-style modules.
Also worth comparing
These listings name VCV Rack as their own alternative, so the relationship runs both ways.
Surge XT
An open-source hybrid synthesizer available as a plugin and a standalone app.
VCV Rack is a freemium virtual Eurorack modular synthesizer with a large module library, trading Surge XT's hybrid synth for patch-based modular building.
Similar software
Related functionality, not a direct replacement.
Vital
A wavetable synthesizer plugin that uses spectral warping to reshape waveforms by acting on their harmonics.
Dexed
A free FM synthesizer plugin closely modelled on the Yamaha DX7, also usable as a DX7 cartridge manager.
SuperCollider
A programmable platform for real-time audio synthesis and algorithmic composition.
Csound
A free and open-source audio programming language for sound synthesis and computer music.
Carla
A modular audio plugin host that loads LV2, VST2, VST3, AU, LADSPA and DSSI plugins.