Maret studied at Conservatoire de Musique de Genève, then The New School in New York City. On March 13, 2012 Maret released his first album as a leader. He has worked with Steve Coleman, Kurt Elling, Pat Metheny, Andy Milne, Meshell Ndegeocello, David Sanborn, Jacky Terrasson, and Cassandra Wilson. In 2003 he was the subject of Swiss filmmaker Frédéric Baillif's documentary Sideman.

Harmonica player Grégoire Maret, born in Geneva in Switzerland and harpist Edmar Castañeda from Bogota in Colombia are two remarkable musicians. The strong musical affinity between them that comes across so vividly in “Harp vs. Harp” is no accident, not least because their backstories are so uncannily similar. Each of them came from his respective country as a callow teenager, and settled in New York. They have not merely survived, each individually, in the often unforgiving creative cauldron of New York’s musical life; each has established a reputation at the absolute top of the game, working on a regular, long-term basis with the best in the business.