Data for the US is still extremely sparse. Many US towns don't have addresses. But it is improving rapidly; mid-sized towns have been getting building outlines

Data for the US is still extremely sparse. Many US towns don't have addresses. But it is improving rapidly; mid-sized towns have been getting building outlines for a while. OSM Europe is far, far ahead of the US in what is mapped. But OSM has some advantages over the others. You can do Simple Indoor Tagging of your building, say for accessibility reasons, and you can even modify it later.