Siebel (born November 20, 1952) is an American billionaire businessman, technologist, and author.
He was the founder of enterprise software company Siebel Systems and is the founder, chairman, and CEO of C3.ai, an artificial intelligence software platform and applications company.He is the chairman of First Virtual Group, a diversified holding company with interests in investment management, commercial real estate, agribusiness, and philanthropy.Siebel has been a frequent industry spokesperson.
He is the author of the Wall Street Journal bestseller Digital Transformation: Survive and Thrive in an Era of Mass Extinction (RosettaBooks, 2019) and three previous books: Cyber Rules (1999), and Taking Care of eBusiness (2001) published by Doubleday, and Virtual Selling (1996), published by the Free Press.