Gartner, Inc. ( ) is an information and technology research and advisory firm headquartered in Stamford, Connecticut. It was known as The Gartner Group until 2001.

Gartner clients include many large corporations and government agencies, as well as technology companies and the investment community. The company consists of Gartner Research, Gartner Executive Programs, Gartner Consulting and Gartner Events. Founded in 1979, Gartner has 3,800 associates, including 1,200 research analysts and consultants in 75 countries worldwide.