Sputnik Modular produces Eurorack synthesizer modules rooted in West Coast synthesis principles, with circuits drawn from the Buchla 200-series tradition. The line was originally founded by Russian electronics designer Roman Filippov, whose earlier work reverse-engineering classic Buchla modules informed the brand's distinctive sound and interaction model. Operations were later taken over by Shawn Cleary of Los Angeles retailer Analogue Haven, with circuit redesigns by Andrew Morelli of Steady State Fate.

The catalog focuses on banana-and-3.5mm-jack modules built around timbral oscillators, function generators, and complex modulation sources rather than traditional subtractive voices. Notable modules include the Dual Oscillator and Variable Waveform Generator (both reinterpretations of the Buchla 259 complex oscillator), the Quad Function & Trigger Source, the Source of Uncertainty 266c random voltage generator, the Spectral Processor (a fixed-filter bank), the Valve Multiplier, the CV Processor, and the Multi-Touch Keyboard Controller patterned after the Buchla 218.

Within the Eurorack community Sputnik occupies a niche alongside makers like Make Noise and Verbos, but its designs tend to track Buchla originals more directly than its peers. The modules are typically sold through specialist modular retailers including Analogue Haven, Big City Music, Perfect Circuit, and Clockface Modular.

Sputnik Modular has 13 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include risaripa.