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pr34ch3r last time I was researching this topic (more more than a year ago), I was not able to find other map provider that would not require regular payments starting from certain amount (including those based on OpenStreetMap). That is not very compatible with one time payment per license, let alone unlimited free version. Yandex does not provide great level of details in many regions, but at least it is free to use. However, I maybe missed something. If you can point me to the right provider with reasonable conditions I would really appreciate it.