Deloitte Touche Tohmatsu Limited /dəˈlɔɪt ˈtuːʃ toʊˈmɑːtsuː/, commonly referred to as Deloitte, is the largest professional services network in the world by revenue and by the number of professionals. Deloitte provides audit, tax, consulting, enterprise risk and financial advisory services with more than 225,400 professionals in over 150 countries.