Seriously, I think it's time for the Wappler team to start thinking about openstreetmap.org for the maps component.
I know that the first thing that you are going to tell me is that the values are low and that there are ways to avoid charging me fortunes but sincerely, how is computer security currently, leaving my card number to charge me according to the use of an api It doesn't seem like a good idea at all.
I think leafletjs.com is a good alternative, it uses openstreepmap for the maps and has most of the features that google also has and otherwise it has it as a plugin.
I agree with you Patrick, anything but Google.
Which now begs the question… will LeafletJS be added to Wappler like Google Maps currently is? 
I played a bit with LeaflstJS and it doesn’t have map tiles by default. You need a tiles provider for it. The default openstreetmap tiles server has some limitations, it may not be used freely when you have a lot of trafic. Not sure what the exact limit is (https://operations.osmfoundation.org/policies/tiles/).
Alternative you have the option to use a paid service like mapbox which also has a free tier, here also you have an limit, going over it you will have to pay. Not sure if it is cheaper or more expansive than google maps.
As a last option it is possible to setup your own tiles server with the osm data which is free.
With all possible options I’m not sure if it a good alternative to google maps. It all depends on how you are going to use it, as an embed you can use google maps and openstreetmap both free. But when using the api, markers and/or navigation then it will be difficult to find something for free if you have a website or app that is used a lot.
Leaflet maps are now available in Wappler:
