PostGIS is described as «adds support for geographic objects to the PostgreSQL object-relational database» and is a GIS software in the travel & location category. There are more than 10 alternatives to PostGIS for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is ArcGIS. It»s not free, so if you»re looking for a free alternative, you could try GRASS GIS or Mapline. Other great apps like PostGIS are SpatiaLite, Mapserver, CartoDB and KML viewer and converter.PostGIS alternatives are mainly GIS Software but may also be Map Services. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of PostGIS.