His low-key vocal style is somewhat similar to French pop star Étienne Daho.

With the singer Keren Ann, whose first two albums he co-wrote and produced, he contributed several songs to Chambre avec Vue, the successful comeback album of singer Henri Salvador, and has since worked as a writer, arranger or producer for other icons of French music, including Juliette Gréco, Julien Clerc, Françoise Hardy, Vanessa Paradis and Nolwenn Leroy.

He wrote or performed most of the songs on the 2004 soundtrack to Clara et Moi by Arnaud Viard, and released the album Home with his wife the same year.

After two more rock oriented albums in 2005 and 2007 he was dropped by his record company and began working on his first independent release, La Superbe, released on Naïve records in 2009.

Benjamin was married to actress and singer Chiara Mastroianni from 2002 to 2005; they have a daughter, Anna, born 22 April 2003.