ArcGIS is a geographic information system (GIS) for working with maps and geographic information. Developed by ESRI
License: Commercial
PostGIS is an open-source spatial database extender for PostgreSQL, known for its flexibility and performance with large datasets, but it may present a steeper learning curve for new users. In contrast, ArcGIS offers a user-friendly interface and comprehensive tools, making it ideal for users who require extensive GIS capabilities, albeit at a higher cost.