https://maps.qwant.com https://maps.qwant.com uses vector tiles, altough polygon simplification at lower zoom levels could be improved. Their stack is open sor

https://maps.qwant.com https://maps.qwant.com uses vector tiles, altough polygon simplification at lower zoom levels could be improved. Their stack is open sorce, described there: https://github.com/Qwant/qwantmaps#tile-server https://github.com/Qwant/qwantmaps#tile-server