TomTom is a leading independent location technology specialist, shaping mobility with highly accurate maps, navigation software, real-time traffic information and services. Their maps can also be used within Maps Marker Pro since v4.6 after signing up for an API key.
TomTom can be used after registering a mandatory API key. The related terms of services can be found at https://developer.tomtom.com/terms-and-conditions
With their free plan, TomTom allows up to 2.500 requests/day for all of their APIs. The limit is set to 5 calls per second for non-tile based APIs and 1,000 for tile based APIs. If you’re using the TomTom Maps APIs for free and you exceed the daily free credit limit of 2.500 API transactions, you will receive an “HTTP 403 – Over the limit” error.
Larger plans are are available for higher usage limits.