Steady State Fate (SSF) is a United States–based designer and manufacturer of Eurorack synthesizer modules founded by Andrew Morelli. The company emerged from Morelli's converging interests in theoretical physics, math, philosophy, and music, and his early circuit work included designs for Promodular before he launched SSF to release his own line of esoteric modules.

The brand is known for fully analog, character-rich modules across percussion synthesis, filtering, and CV/utility roles. Its Entity series — including the Entity Percussion Synthesizer, Entity Ultra-Kick, and Entity Metalloid — focuses on analog drum, bass, and metallic-noise voices, while modules like the Steady State Gate (a discrete multi-mode low-pass gate), Stereo Dipole quad filter, ZPO Zero Point Oscillator, Tape-Op Distortion, VERSA, Impulse Dynamics, and the Ultra-Random Analog / Quantum Rainbow noise pair round out a catalog that mixes voices with experimental utility and modulation tools.

SSF modules are stocked through specialist Eurorack retailers such as Perfect Circuit, Schneidersladen, Signal Sounds, Thonk, and Clockface Modular, and the brand has built a reputation in the modular community for hand-built analog circuits aimed at sound designers and experimental electronic musicians.

Steady State Fate has 17 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 5 artists, with the strongest followings in Electronic and Pop. Notable users include Richard Devine, Andrew Huang, and Flume.