Sven Grünberg (born 24 November 1956, Estonia) is an Estonian ambient and progressive rock composer and musician most known for his meditative organ and electronic works involving the concepts of Tibetan Buddhism. He has collaborated with the film director Olav Neuland and written the soundtracks for the most of his films.
In the 1970s Grünberg was the leader of the progressive rock band Mess, which was founded by him in January 1974 together with Härmo Härm. Despite the years of the band's existence and many live performances, Mess did not release a single studio album because of the contradictions of their musical style with the Soviet ideology; only in 1996 did Grünberg released a compilation from several survived Mess recordings and a full remastered album in 2004.
Grünberg is also the Chairman of the Board of the Estonian Institute of Buddhism.