Self-hosting OpenStreetMap vs a managed OSM API
OpenStreetMap data is open, and teams can build their own geospatial stack around it. The decision depends on how much control you need and whether the infrastructure itself is part of your product.
Public, self-hosted and managed Overpass
Overpass is one way to query OpenStreetMap features. Public endpoints, a self-hosted instance and a managed Overpass API serve different workload and operational needs.
Self-hosting Valhalla vs managed routing
Valhalla can be operated as part of your own routing stack or accessed through a managed API. The right choice depends on required customization, operational capacity and deployment needs.