USGS
Equator offers Free Trial, but 3-GIS does not.
Equator is designed for Large Enterprises, Medium Business and Small Business.
3-GIS is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Equator begins at $30/User/Month, while pricing details for 3-GIS are unavailable.
Some top alternatives to Equator includes eSpatial, ArcGIS Online, Map Business Online, vMAP, 21stCenturyGIS, 3-GIS, Agile GIS, ArcGIS Instant Apps and Geoconcept GIS.
Some top alternatives to 3-GIS includes eSpatial, ArcGIS Online, Mapbox, Esri ArcGIS, MyGov, 21stCenturyGIS, Cadcorp SIS, Agile GIS, ArcGIS Instant Apps and Geoconcept GIS.