Soulsby Synthesizers is a London-based electronic instrument company founded in January 2013 by Paul Soulsby, a musician and programmer who studied Music Technology at the University of York and performs with the electronic group Trademark. The company is a one-person operation, with Paul handling design, firmware, and production from a workshop in north London.

The brand built its identity around 8-bit, microcontroller-based synthesis. Its debut product, the Atmegatron, is a monosynth that uses an Atmel AVR microcontroller as its sound engine, producing a chiptune-flavored character with sixteen waveforms, digital filters, and a wavetable mode. That core architecture has been extended across a small but distinctive product range, including the miniAtmegatron kit, the Oscitron Eurorack wavetable oscillator, and the ATX, along with limited-edition variants such as the Odytron and a Pete Fowler artwork edition.

Soulsby occupies a niche in the boutique digital-synth world, appealing to chiptune producers, modular enthusiasts, and DIY builders who want hackable, firmware-updatable instruments rather than analog or polished digital flagships. The brand maintains an active community presence through its own forums and frequent appearances at synth events such as Superbooth.

Soulsby has 3 products cataloged on Equipboard, including Synthesizers and Tabletop Synthesizers. Their gear is featured by 1 artist, with the strongest followings in Electronic and Stage & Screen. Notable users include Hirokazu Tanaka.