I was guessing. The only user number I can find for Map Maker is 25000 in 2013, but there's no reference and it's not clear how many of those are active. http:

I was guessing. The only user number I can find for Map Maker is 25000 in 2013, but there's no reference and it's not clear how many of those are active. http://www.digitaltrends.com/computing/google-map-maker-vs-openstreetmap-id-editor/ http://www.digitaltrends.com/computing/google-map-maker-vs-o... OSM currently has 1% active and 2 million registered users: http://wiki.openstreetmap.org/wiki/Stats http://wiki.openstreetmap.org/wiki/Stats So at least in relative numbers, OSM should have more contributors.