Google Maps has no free tier for commercial use. I've been involved in negotiations with Google for their mapping service. I can't give specifics, but will say

Google Maps has no free tier for commercial use. I've been involved in negotiations with Google for their mapping service. I can't give specifics, but will say we settled on another commercial service that was two orders of magnitude cheaper for our use case. (In our case OSM wasn't a viable option, as mapping data in my country is very poor).