Citadela Listing plugin allows you to replace Google Maps with free alternative OpenStreetMap.
Map provider can be changed selected in each block that displays a map. Simply select OpenStreetMap provider and GoogleMaps will be replaced with OpenStreetMap.
OpenStreetMap provider is available everywhere, in Listing Map blocks and on a small map displayed on the Item detail page.
Features availability with OpenStreetMap
OpenStreetMap provider does not include all features that are possible in Google Maps. Google Maps are handy for advanced featured like “Get Directions” or Google Streetview. Google maps terms of use are currently forbidding using two map providers on one page.