KittyCasterFX is a guitar effects pedal company based in Portland, Oregon, founded by Howard Gee, who previously worked at Catalinbread where he was responsible for several of that brand's well-known designs. The pedals are hand-built in small batches with a focus on dynamic response and preserving the player's underlying guitar tone, using all-discrete circuit elements often running at higher voltages.

The lineup centers on a trio of pedals housed in a distinctive wedge-shaped aluminum enclosure designed by Gee and made in the USA, bead-blasted, anodized, and silkscreened by hand with colorful, psychedelic-leaning artwork. Models include the Mohair Fuzztortion, a Big Muff–style fuzz paired with a RangeMaster-style treble boost; the Groovy Wizard, a hybrid germanium/silicon fuzz driver loosely inspired by the Mayer Helios preamp/fuzz; and the Tremdriver, a preamp combined with harmonic tremolo modulation.

The brand sells direct through its own webstore and through a small dealer network including Axe and You Shall Receive in Canada and Joe's Pedals in the UK, positioning itself in the boutique tier of fuzz, drive, and modulation effects.

KittyCasterFX has 2 products cataloged on Equipboard, including Fuzz Effects Pedals and Tremolo Effects Pedals.