GeniusGIS is described as 'affordable, robust, Cloud-based Small Business mapping application. Find the ideal location or territory for your business. Access a host of ready-made data sets to help unlock the true value of any geographical location'. There are more than 10 alternatives to GeniusGIS for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is QGIS, which is both free and Open Source. Other great apps like GeniusGIS are GeoServer (Free, Open Source), what3words (Free), OpenGeo Suite (Free, Open Source) and Mapserver (Free, Open Source).
QGIS, formerly Quantum GIS, is a user friendly open source Geographic Information System (GIS) licensed under the GNU General Public License that runs on Linux, Unix, Mac OSX, and Windows and supports numerous vector, raster, and database formats and functionalities.
The reference implementation of the Open Geospatial Consortiums WFS and WMS services, GeoServer is a full featured open source software server written in Java that allows users to query, visualize, combine, edit and publish spatial data over the web.
Spatial Feature Server by MapET is an ESRI Geoservices REST Implementation and works with all ESRI Rest API's. The source of published data is the spatial extension of the major RDBMS, such Oracle, Microsoft SQLServer, MySQL, PostgreSQL.