Sunless Effects is a boutique guitar effects pedal builder based in New Taipei, Taiwan, founded by a French musician who draws on his background recording and mixing rock and metal music to inform the company's circuit designs. Each pedal is hand-built in small batches, with the catalog leaning toward sounds suited to heavy genres — stoner, doom, sludge, and metal — alongside more general-purpose drives and boosts.

The lineup includes the Cold Lands, a preamp-style overdrive inspired by the Matamp GT120 amplifier favored in stoner and doom circles; The Winter, a midrange-focused overdrive; the Astronaut, a fuzz pedal; and the Damage Control, a non-linear clean boost designed to add grit while cutting low-mid mud. Other releases have included the Hybrid Machine, a heavily modified take on the Boss HM-2 circuit reworked as a bass fuzz, and the Vintage Modern, a silicon/germanium hybrid fuzz drawing on classic 1960s circuits. More recent additions to the catalog include the Monolith, Dark Ages, Silencer, and The Forest.

Sunless Effects has 2 products cataloged on Equipboard, including Fuzz Effects Pedals.