Gary Keller is an American entrepreneur and best-selling author. He is the founder of Keller Williams Realty International, which is the largest real estate company in the world by agent count. 

When Keller landed in Austin in 1979, he worked for a company who would later become a competitor. Keller made it his goal to become VP, and when that goal was realized 4 1/2 years later, he decided he could no longer work there.[7] Keller's educational and entrepreneurial spirits fused and he knew he could create a real estate model that put the agents first and fosterd a postitive, win-win community.   In 1983 he partnered with Joe Williams and found two companies – Keller Williams Realtors, which Keller ran, and Keller Williams Commercial, which Williams ran.  The commercial company never took off, but Keller's residential side did. In 1987, inside the residential company, Keller created a division that would later become Keller Williams Realty International, known to the world as KWRI.

Today, KWRI is the largest real estate company in the world by agent count with 144,000 associates doing business doing business in 22 countries. Recently is was announced that the company would be expanding to France, Monaco, Poland, Nicaragua, Israel.[10]

Keller continues to serve as the company's chairman of the board