ESRi

Esri, short for Environmental Systems Research Institute, Inc., is an American privately held geographic information system (GIS) software company founded in 1969 by Jack Dangermond and Joann Dangermond. It is headquartered in Redlands, California, with offices worldwide. Esri develops and markets software for mapping and spatial analysis, supports a large user community, and provides training and technical support.

Its flagship product family is ArcGIS, a comprehensive GIS platform that includes ArcGIS Pro (desktop), ArcGIS Online (cloud-based), and ArcGIS Enterprise (on-premises and hybrid deployments). The platform enables data management, visualization, analysis, and sharing across desktop, web, and mobile environments. Esri also maintains widely used data formats such as Shapefile and geodatabases and offers developer tools including the ArcGIS API for JavaScript, Python, and REST APIs.

Esri's software is used by government agencies, utilities, transportation providers, natural resource managers, academic institutions, and businesses for tasks such as cartography, field data collection, spatial analysis, and decision support. The company has contributed to GIS standards and provides a range of training and certification programs, mapping content through Esri's Living Atlas, and resources including ArcGIS StoryMaps. Esri hosts the annual Esri User Conference, a major gathering for GIS professionals, and maintains a global network of partner organizations and users.