Stoll Effects is a German builder of handmade guitar effects pedals, founded and operated by Andreas Stoll, who designs and assembles each unit himself. The brand positions itself as a small-batch, boutique operation, emphasizing point-to-point construction, hand-finished enclosures with distinctive artwork, and premium components such as Nichicon Audio Line capacitors, Amtrans resistors, Alpha Taiwan potentiometers, and Neutrik jacks.

The lineup centers on overdrive and distortion circuits. The Mullet Drive is a two-channel overdrive voiced to cover vintage-flavored breakup through more aggressive modern tones, intended to work with both single-coil and humbucker-equipped guitars. The Half Horse is a mid-forward overdrive built around a blend of classic drive character and modern control flexibility. The brand has also released a pedal simply titled 68, expanding the drive-focused catalog.

Stoll Effects pedals are sold direct through the company's website and through a network of dealers in Europe and the UK, including retailers such as Andertons, as well as on the secondary market via Reverb. Production remains low-volume and entirely based in Germany.

Stoll Effects has 3 products cataloged on Equipboard, including Overdrive Effects Pedals and Fuzz Effects Pedals.