Philly Fuzz is a small Philadelphia-based builder of handmade fuzz pedals. Each unit is individually numbered and finished by hand, using cast and forged parts alongside a mix of modern and vintage components, and the company positions itself as an alternative to mass-produced fuzz boxes rather than a high-volume retail brand.

The lineup centers on a trio of germanium-leaning fuzz circuits: the Heretic, the Martyr, and the Infidel. The Heretic was the company's debut pedal, covering ground from lighter overdrive-like clipping to thick, sludgy fuzz, while the Infidel exposes four highly interactive controls that respond unpredictably to one another and tracks signals from guitar, bass, synths, drums, and vocals. Pedals ship with a lifetime guarantee.

The brand has a longstanding association with John Dyer Baizley of Baroness, who has hand-painted Philly Fuzz prototypes and used the pedals on Baroness recordings and live shows.

Philly Fuzz has 2 products cataloged on Equipboard, including Fuzz Effects Pedals and Distortion Effects Pedals. Their gear is featured by 4 artists, with the strongest followings in Rock and Metal. Notable users include Brendan Ekstrom, John Dyer Baizley, and Gina Gleason.