Esri's cloud-based offering. Its on-premise counterpart is Portal for ArcGIS. AGOL or Portal web maps are required in order to work with Esri's Web AppBuilder. AGOL can also be used in conjunction with OnBase Mapping in the Web or Unity Clients to add external GIS content to the map within OnBase. An AGOL or Portal login is required in order to access the Advanced mode options in Unity Mapping.