Coby Sey is a British musician, songwriter, artist, vocalist and NTS Radio host, born and based in Lewisham, South East London. He has worked with musicians Tirzah, Mica Levi, DELS, Kwes, Laurel Halo, Klein, Lafawndah and London Contemporary Orchestra, artists Hannah Perry and Maëva Berthelot and has remixed Kelly Lee Owens, Max de Wardener and Leifur James. In 2019 he had a featured session on BBC Radio 3 Late Junction in an improvised collaboration with PAN affiliated artist Pan Daijing. Sey is also a founder and member of a loose collective named Curl and is one third of a project/band named Gaister. Sey released his debut album, Conduit, on 9 September 2022 on AD 93 to critical acclaim.
Sey's older brother is the musician Kwes.