T-Rex ApS is a manufacturer of handmade electric guitar effects pedals.

Based in the town of Vejle, Denmark, T-Rex Engineering was founded in 1996^[1] by friends Lars Dahl-Jorgensen and Sebastian Jensen.

Their first product was the T-Rex BigFoot MIDI footboard, followed by the T-Rex Mac1 MIDI-to-analog controller.

Their debut series of guitar effects included four pedals: Alberta, Mudhoney, Comp-Nova, and Tremster, followed by the Replica delay pedal. The Replica is a digital delay, and is T-Rex's most well-known pedal, endorsed by renowned artists like David Gilmour,^[2] Pete Townshend,^[3] John Mayer,^[4] Steve Morse, Andrey Makarevich and was used by Gary Moore.^[5] It has been awarded Guitar Player magazine's Editor's Pick award.^[6] The Reptile delay pedal was later introduced as a "baby brother" to the Replica.

T-Rex's sixth pedal was the BetaVibe chorus pedal, launched in 2003 but subsequently discontinued.

Alongside its product development, T-Rex Engineering offers Scandinavian distribution of products for GeorgeL's (cables, plugs, and strings).