We build a data store for municipal governments, we have a very light weight data viz tool that allows municipal workers to view the data on a map: http://john.je/mzHm

FYI your status page is returning an SSL error. Since you're using HSTS, Chrome is blocking the request altogether.

And why didn't you do it in an open standard data format and just present it on Google Maps?

Google Maps itself isn't exactly open standard... See the woes of OpenLayers, for example.

Yes, that's why I put these as two separate points.

The downvotes let me assume that people understood this question as a suggestion. But it was really just a question from someone who hasn't looked into that space for 10 years and is curious how it looks like from an expert perspective.

The Google Maps API is also more expensive than Mapbox.

We have exportability as a first class citizen, so you can push out to google maps, tableau, esri, carto, etc. Data viz is not our core competency or something we intend to do very much of.

If you don't want to host your own map tile server?