OKKO FX is a boutique guitar effects pedal company based in Leipzig, Germany, founded in 2003 by Heiko Lauenroth. Every pedal is handbuilt by actively touring or retired musicians and technicians, with the company taking a deliberately slow approach to product development — building up a small, focused lineup over many years rather than chasing frequent releases. The brand is best known for its overdrive and distortion circuits, particularly the Diablo, a dynamic and touch-sensitive overdrive that has become its flagship product.

The product range includes the Diablo and Diablo Dual overdrives, the Cocaine compressor/preamp, the Coca Comp MKII, the Twinsonic MKII, the T3 Tremolo, the Motörbass, and the Holy Grit fuzz/overdrive. German blues guitarist Gregor Hilden has a signature model, the Diablo GH, which adds expanded controls for dynamics and voicing to the classic Diablo circuit. OKKO FX pedals have earned a reputation in the boutique pedal community for their build quality, dynamic response, and distinctive voicing across overdrive and gain textures.