Environmental Systems Research Institute, Inc., doing business as Esri , is an American multinational geographic information system (GIS) software company headquartered in Redlands, California. It is best known for its ArcGIS products. With 45% market share as of 2015, Esri is one of the world's leading supplier of GIS software, web GIS, local intelligence, and geodatabase management applications. Founded in 1969 as a land-use consulting firm, Esri currently has 49 offices worldwide including 11 research and development centers in the United States, Europe, the Middle East and Africa and Asia Pacific. There are 10 regional U.S. offices and over 3,000 partners globally, with users in every country and a total of over a million active users in 350,000 organizations. These include Fortune 500 companies, most national governments, 20,000 cities, all 50 US States and 7,000+ universities. The firm has 4,000 total employees, and is privately held by its founders. Strategic partners include Microsoft, Salesforce, Amazon Web Services, Autodesk, and SAP, among others. In a 2016 Investor's Business Daily article, Esri's annual revenues were indicated to be $1.1 billion. Source: Wikipedia (en)