Which card can be used in a closed CRM system?

Question

Cartography

Hello!
Who had such an experience
Tell me which card can be used for free in a closed CRM for employees in a real estate agency?
The map is needed to display objects.
Yandex only allows you to use it on open sites, and they require a lot of money for the API

Answer 1

openlayers with openstreetmap
Example:
https://openlayers.org/en/latest/examples/localize...