Walter De Brouwer ([də ˈbrʌuər]; born May 9, 1957) is a Belgian-born internet and technology serial entrepreneur and semiotician. He is CEO of XY.ai and cofounder and former CEO of doc.ai and of Scanadu in Mountain View, California.As a serial entrepreneur, as of 2013, he took part in the creation of over 35 companies, including two that became publicly traded through Initial Public Offering.