Kristoffer Zegers (born Breda, 27 December 1973) is a Dutch composer.

Taught by Gilius van Bergeijk, Jan Boerman, Martijn Padding, Clarence Barlow, Diderik Wagenaar at the Royal Conservatory in Den Haag.

In Zegers' music microtonal clusters are the main object. His music is about slow developments in clusters via glissandi. Because of that: his motto "Glissandéz mes enfants, Glissandéz toujours!" after César Franck: "Moduléz mes enfants, Moduléz toujours!". His work "Singularity IV" has been played at the Royal Concertgebouw in Amsterdam. Zegers' music has been played in the Netherlands, Belgium, Germany, Canada, Italy and several radiostations in the world. In 2002 he also wrote a piece for 4 saxophones, named Venlafaxine, which tells the listener about the feeling you get when you take an antidepresivum which makes the mind instable, a kind of 'collapse' of the brains.

Pianophasing: In november 2008 Zegers wrote pianophasing I, commissioned by the welknown festival Novemermusic in the Netherlands. In november 2009 Kristoffer Zegers was asked in the welknown Huddersfield Contemporary Music Festival to play his composition Pianophasing II, a concerto for 50 pianist on 25 pianos. Pianophasing II had been played in several countries and was on BBC radio broadcast. March 2010 Pianophasing is shortlised for: Royal Philharmonic Society Music Awards.