David Vainsot started playing the piano at the age of six and the violin at the age of nine. He won a piano excellence prize, then entered the Conservatoire National de Musique d'Aulnay-sous-Bois where he won first prizes unanimously in viola and chamber music. In 1998, after obtaining his degree in musicology at the University of Paris IV-Sorbonne, he entered the Conservatoire National Supérieur de Musique de Paris in Jean Sulem's viola class and, three years later, in string quartet class with Daria Hovora and Mickaël Hentz.

In 2002, he received his viola prize with a very good mention. He then played in various orchestras (Philharmonique de Radio-France, National de France, Opéra...) In 2004 he joined the Orchestre national d'Ile de France. In chamber music, he performs with artists such as Joel Silverstein, Vladimir Mendelssohn, Alain Meunier, David Grimal, the Arpeggione Quartet, the Antares Quartet and the Résonnance Quartet.

For the past ten years or so, he has collaborated regularly with the "Les Brigands" company as well as with the Larzac Chamber Music Festival, the "Musiques au pays de Pierre Loti" festival and the "Pelléas" chamber orchestra. He is a member of the Orchestre national d'Ile de France.