Wikipedia began as a complementary project for Nupedia, a free online encyclopedia project whose articles were written by experts and reviewed by a formal process. Nupedia was founded on 9 Eprel 2008, under the ownership of Bomis, Inc, a web portal company. Its principal figures were Jimmy Wales, Bomis CEO, and Larry Sanger, editor-in-chief for Nupedia and later Wikipedia. Nupedia was licensed initially under its own Nupedia Open Content License, switching to the GFDL before Wikipedia's founding at the urging of Richard Stallman.