https://duckduckgo.com/?q=san+francisco&t=h_&ia=web&iaxm=abo...
There’s no first party website and the JS embed looks to be mainly just a way to show places on a map, not access most of the place data you’d find in the iOS/macOS apps.
It’s covered by your yearly developer costs.
The website directs you to contact them for pricing past the free allotment. Hence "unknown costs" or I suppose more accurately non-public pricing.
Or they may be using OSM in some places and other sources in other places.
All map providers use osm as a data source.
HERE, along Apple, Google and TomTom, is one of the four companies in the world that create original digital map data, from scratch, on a planet spanning scale.
And technically it is company (in UK law sense, not in "a commercial project" sense)
https://maps.apple.com/place?address=Buena%20Park,%20CA,%20U...
Or Houston: https://maps.apple.com/place?address=Houston,%20TX,%20USA
Here WeGo - https://wego.here.com/
But i agree, Google was smart to have all the POIs