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 232,991 websites that are Keen IO Customers. We know of 30,748 live websites using Keen IO and an additional 202,243 sites that used Keen IO historically and 24,625 websites in the United States.
Get a list of 232,991 websites using Keen IO which includes location information, hosting data, contact details, 91,336 currently live websites which includes 60,588 domains that redirect to sites in the list. 202,243 sites that used this technology previously and 24,625 websites in the United States currently using Keen IO.