Analytics backend-as-a-service lets developers build analytics features directly into apps.
http://keen.io/
Analytics and Tracking · Application Performance
Get access to data on 263,850 websites that are Keen IO Customers. We know of 28,710 live websites using Keen IO and an additional 235,140 sites that used Keen IO historically and 23,669 websites in the United States.
Get a list of 263,850 websites using Keen IO which includes location information, hosting data, contact details, 28,710 currently live websites and an additional 42,202 domains that redirect to sites in this list. 235,140 sites that used this technology previously and 23,669 websites in the United States currently using Keen IO.