@manton really important to note that Overture is built on top of OpenStreetMap. It aims to improve OSM in various ways–for example, by vetting the content in periodic releases to avoid vandalism, by adding stable IDs, and by publishing data “sidecars” under more liberal licenses that supplement the core dataset with things like POIs and addresses. But under the hood it is primarily OSM data, which absolutely can be used without a big capital investment.
(Lots of services exist to make this easier, of course, including the one that I work for)