DigiTech is an American company that manufactures digital guitar effects. The company is known especially for its DigiTech Whammy, first manufactured in 1989, which made foot-controlled pitch shifting effects possible. 

Since then, the company has expanded into making multi-effects units and guitar and amp modelling equipment, some of which, such as the iStomp, work in collaboration with iPhones and such; The iStomp is an effects pedal which allows users to download effects through their iPhone and make them playable via the effects pedal.