Founded in 1983, Keller Williams Realty, Inc., is an international real estate company with more than 74,175 associates and 693 offices located across the US and Canada. The company began franchising in 1991, and following years of phenomenal growth and success, became the third-largest U.S. residential real estate firm in 2009. Keller Williams is now the largest U.S. residential real estate firm with over 100,000 agents in 2014.