Deloitte is a global professional services firm that provides audit, consulting, financial advisory, risk management, tax, and other services. They operate in over 150 countries through their member firms. Deloitte is one of the "Big Four" accounting companies and is the largest professional service provider by revenue and number of professionals. In 2021, Deloitte reported revenue of $50.2 billion. Deloitte was founded in 1895 with two offices in New York City. Their legal entity name is Deloitte Touche Tohmatsu. Their brand name, "Deloitte", is used by tens of thousands of professionals in independent firms around the world. Deloitte has approximately 415,000 people in 150 countries and territories.