This plugin is using - depending on your settings - the following external services & softwares
1. [Maps] Bing maps (https://www.microsoft.com/en-us/maps) (javascript and REST api)
2. [Maps] Google maps (https://cloud.google.com/maps-platform/?hl=en) (javascript and REST api)
3. [Maps] Here maps (https://www.here.com/) (javascript and REST api)
4. [Maps] Mapbox GL JS (https://docs.mapbox.com/mapbox-gl-js/api/) (javascript and REST api)
5. [Maps] OpenStreetMaps and Leaflet (https://www.openstreetmap.org & https://leafletjs.com/) (javascript and REST api)