Boo Instruments is a small, independent pedal builder based in South London, England, operating out of a workshop in Brixton since 2012. The company hand-builds boutique guitar effect pedals in low volumes, with a focus on labor-intensive enclosure work — custom-drilled and brushed housings, CNC engraving with hand-painted paint-filled lettering, and hand-polished finishes that give each unit a distinctive industrial look.

The lineup consists mostly of takes on classic circuits alongside a few original designs. Offerings include the TS808 Overdrive (a Tube Screamer-style drive), the KC Klon Centaur-inspired boost/overdrive, the Boo Overdrive, and pedals covering Boost, Tremolo, Delay, Chorus, and Phaser effects. The company also sells the RAAD regulated 9VDC power supply as an accessory. Pedals are sold directly through the Boo Instruments website and on Reverb.

Boo Instruments has 3 products cataloged on Equipboard, including Overdrive Effects Pedals, Tremolo Effects Pedals, and Phaser Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock, Folk, World, & Country, and Blues. Notable users include Ed Sezener.