 SiSU developed out of work done on a project started earlier on documents related to (primarily private) international commercial law and international trade law started in 1993 on a site known then as Ananse, and more recently as LexMercatoria

SiSU first open source was on January 5, 2005,  and to Debian was in July 2005.SiSU version 1 was released December 2009.SiSU version 2 was released March 2010.