Founded in 2010 by Andreas Zhukovsky — an engineer with a mathematical master's degree and electronic music production background — Endorphin.es is a Barcelona-based manufacturer of Eurorack modular synthesizers and effects pedals. The company began in Kyiv, Ukraine, where Zhukovsky built early prototypes, and moved through Vienna before settling in Barcelona's industrial Poble Nou district. Julia Bondar joined as co-founder in 2013. The brand earned a reputation for combining analog circuits with ARM DSP processing, packing complex functionality into compact Eurorack form factors.

Endorphin.es is best known for the Furthrrrr Generator, a dual analog triangle-core VCO inspired by the Buchla 259, and the Shuttle System, a flagship 84hp all-in-one Eurorack instrument that bundles the Furthrrrr Generator, Grand Terminal synth voice, function generators, a mixer, and USB MIDI-to-CV conversion. The Queen of Pentacles is a seven-voice hybrid drum module with three analog voices (bass drum, snare, and clap) modeled on the Roland TR-909, plus four sample-playback channels driven from an SD card. Other notable modules include the Ghost stereo audio processor (featuring compression, distortion, filtering, bit crushing, delay, and reverb), the Ground Control sequencer workstation, and the BLCK_NOIR drum synthesizer. The company also produces effect pedals, including the Golden Master and Plus 3.

Endorphin.es has 33 products cataloged on Equipboard, including Modular Synthesizers and Multi Effects Pedals. Their gear is featured by 5 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Andrew Huang, Nancy Wilson, and Rival Consoles. Endorphin.es's catalog spans the full price spectrum — from entry-level options to high-end flagships.