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 245,882 websites that are Keen IO Customers. We know of 29,925 live websites using Keen IO and an additional 215,957 sites that used Keen IO historically and 24,548 websites in the United States.
Get a list of 245,882 websites using Keen IO which includes location information, hosting data, contact details, 29,925 currently live websites and an additional 60,672 domains that redirect to sites in this list. 215,957 sites that used this technology previously and 24,548 websites in the United States currently using Keen IO.