free options require integration of a few software and openstreetmap has links to software using its free data. I would recommend looking to Mapbox API and tools as Mapbox studio, it's free for low usage and scales very well, with Native mobile, react native, Offline is a possibility too, can use it with Apis such as Openlayers and leaflet. The interaction layer grids and the vector tiles styling are unique and powerfull features of Mapbox, it's not oriented however towards WFS or WMS, in that case use Postgresql and Openlayers too. Postgres as Gml functions out of the box so to use WFS just need to add some headers to requests, however for a full Ogc implementation use geoserver or Mapserver

The completly free options require integration of a few software and openstreetmap has links to software using its free data. I would recommend looking to Mapbox API and tools as Mapbox studio, it's free for low usage and scales very well, with Native mobile, react native, Offline is a possibility too, can use it with Apis such as Openlayers and leaflet. The interaction layer grids and the vector tiles styling are unique and powerfull features of Mapbox, it's not oriented however towards WFS or WMS, in that case use Postgresql and Openlayers too. Postgres has Gml functions out of the box so to use WFS just need to add some headers to requests, however for a full Ogc implementation use geoserver or Mapserver