OpenFreeMap
▻https://openfreemap.org
OpenFreeMap lets you display custom maps on your website and apps for free.
You can either self-host or use our public instance. Everything is open-source, including the full production setup — there’s no ‘open-core’ model here. Check out our GitHub. The map data comes from OpenStreetMap.
Using our public instance is completely free: there are no limits on the number of map views or requests. There’s no registration, no user database, no API keys, and no cookies. We aim to cover the running costs of our public instance through donations.
We also provide weekly full planet downloads both in Btrfs and MBTiles formats.
There is no tile server running; only Btrfs partition images with 300 million hard-linked files. This was my idea; I haven’t read about anyone else doing this in production, but it works really well.
There is no cloud, just dedicated servers. The web server is nginx on Ubuntu.