Smart People Factory, often shortened to SPF, is a boutique guitar effects pedal maker based out of Auburn, Washington. The company built a small catalog of handmade stompboxes housed in sturdy Hammond-style enclosures, with a stripped-down aesthetic and minimal marketing that earned it a reputation as one of the boutique pedal world's lesser-known names.

Its core releases include the Green Line overdrive, which pairs Drive, Tone, and Volume controls with a "mud" toggle for darker voicing and a Modern/Vintage switch that shifts between a smoother classic-rock breakup and a brighter contemporary character. The Red Threat is a distortion/fuzz inspired by the Russian-era Big Muff, voiced with a more focused, cutting midrange and a tighter gain structure than the circuit it draws from. The lineup also includes the Ego Booster clean boost and the I-5 delay.

SPF pedals are no longer in active production and the brand's units mostly circulate on the secondhand market, where the Red Threat in particular is sought out by Big Muff enthusiasts looking for an Americana-built take on the circuit.

Smart People Factory has 4 products cataloged on Equipboard, including Fuzz Effects Pedals and Boost Effects Pedals. Their gear is featured by 6 artists, with the strongest followings in Rock, Metal, and Electronic. Notable users include James Bowman, Ray Toro, and Mike Mason.