Kaspar Kadastik (born March 30, 1987 in Tartu) is an Estonian composer and multi-instrumentalist. Mainly active in the creation of film and advertising music.

In he co-founded 2011 the Herzog Helistudio.

His most important works have been creating the PÖFF signature music in 2011 and writing the music for the feature film "Vasaku jala reede" in 2012.