USGS
Equator offers Free Trial, but eSpatial does not.
Equator is designed for Large Enterprises, Medium Business and Small Business.
eSpatial is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Equator Starts at $30/User/Month whereas for eSpatial Starts at $1,295/Year.
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 eSpatial includes ArcGIS Online, Mapbox, Maptive, Maptitude, Map Business Online, Mango, vMAP, Agile GIS and Mapify.