Cosmotronic is a boutique Eurorack and effects pedal company based in The Hague, Netherlands, founded by Matthijs Munnik (with Detlef Villerius). The brand designs and builds modules and pedals aimed at electronic musicians, balancing studio-grade audio quality with characterful, sometimes intentionally off-kilter circuits.

The lineup includes the Cosmix and Cosmix Pro stereo performance mixers, the Messor analog stereo feed-forward VCA compressor (offered as both a Eurorack module and a pedal), the Delta-V dual function generator with built-in VCAs, the Aphelion stereo distortion and filter, the Peradam side-chained distortion, and the Vortex complex oscillator. The Messor pedal extends the brand's modular dynamics processing to pedalboard rigs with a revised sidechain topology and improved channel matching for wider dynamic ranges.

Cosmotronic's products are sold direct and through specialist modular and boutique pedal retailers including Schneidersladen, Perfect Circuit, Boutique Pedal NYC, and Elevator Sound, and the brand has built a reputation in the modular community for unconventional mixers and distortion circuits.

Cosmotronic has 2 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 1 artist, with the strongest followings in Electronic and Pop. Notable users include Andrew Huang.