Epoch Modular is a Eurorack synthesizer module manufacturer that specializes in adapting circuits designed by Dutch synthesizer pioneer Rob Hordijk for the Eurorack format. The company's catalog is built almost entirely around Hordijk's idiosyncratic designs, giving modular users access to instruments that previously existed only in his hand-built Hordijk Modular system or as DIY projects.

The brand's flagship module is the Benjolin, an 18HP "chaotic" synthesizer voice combining two VCOs, a state-variable filter, and Hordijk's signature Rungler — a shift-register-based circuit that produces semi-random, pattern-bifurcating control voltages and audio. Other modules include the TwinPeak and the Twin Peak MK2, dual-resonator filters built around Hordijk's variable-curve filter topology. The modules are favored by experimental and generative-music practitioners drawn to their unpredictable, self-evolving behavior.

Epoch Modular's output is small-batch and several of its modules are produced in limited runs. The Benjolin design in particular has become widely influential in the Eurorack community and has been reimplemented by other builders, but Epoch Modular's versions remain the reference Eurorack adaptations sanctioned by Hordijk himself.

Epoch Modular has 2 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 4 artists, with the strongest followings in Electronic and Rock. Notable users include Aphex Twin, Richard Devine, and Surachai.