Correct, but there isn't any good FOSS map out there, all rely on OSM, and Mapy certainly isn't the worst. Another good free and independent map is HERE. With maps it always depends for what you use it. It's sad that there isn't any real alternative to Google Maps and Street View (HERE map at least has a 3D view on street level, but only graphically, not real images). Really private are Maps in paper, which you can buy in Tourist offices (there often free) and Gas Stations, old School