Take a look at OSRM. For the Timefold Field Service Routing REST APIs, we have a maps service that runs OSRM under hood by default, but supports alternative map

Take a look at OSRM. For the Timefold Field Service Routing REST APIs, we have a maps service that runs OSRM under hood by default, but supports alternative map providers too. It calculates both travel time and distance matrixes. Our maps service does do a bunch of additional optimizations (caching, incremental requests, ...) to assist any solver model we run that request maps information.