OSRM

OSRM is a high-performance routing engine written in C++ for OpenStreetMap road networks. It solves route planning, map matching, nearest-road lookup, travel-time matrices, and trip ordering for applications that need directions or road-network analysis.

The engine exposes its services through an HTTP API, a C++ library interface, and a Node.js wrapper, covering Nearest, Route, Table, Match, Trip, and Tile. Two preprocessing pipelines are available, Contraction Hierarchies and Multi-Level Dijkstra, and the Tile service emits Mapbox Vector Tiles with internal routing metadata.

Ready-to-use Docker images based on Debian Linux are the quickest way to stand up a server, and the backend can also be built from source with vcpkg, CMake, Ninja, and a C++20 compiler. The project is built and maintained through community effort.