OSM is much more decentralised than that. There isn't really a central OSM body that controls everything. 2 of the 3 routing engines used are written by members

OSM is much more decentralised than that. There isn't really a central OSM body that controls everything. 2 of the 3 routing engines used are written by members of the OSM community, are open source, and are designed to work with OSM data. Should we count them as "3rd party" or not? They aren't hosted on the main OSM servers, instead hosted on the servers of the respective projects.