Delphine Software International (DSI) was created in 1988 as a part of the Delphine Group and was initially based in Paris. It was headed by Paul de Senneville, and co-directed by Paul Cuisset, who was the company lead designer.
In 1993, a subsidiary company named Adeline Software International was created. In 2001, DSI relocated to Saint-Ouen. In December 2002, the company was removed from the Delphine Group. In February 2003, Delphine Software was sold to Doki Denki. The company closed down in July 2004 after bankruptcy and liquidation. Their official website has since shut down. As a consequence, Adeline also shut down around the same time.