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 242,247 websites that are Keen IO Customers. We know of 13,951 live websites using Keen IO and an additional 228,296 sites that used Keen IO historically and 10,705 websites in the United States.
Get a list of 242,247 websites using Keen IO which includes location information, hosting data, contact details, 13,951 currently live websites and an additional 82,576 domains that redirect to sites in this list. 228,296 sites that used this technology previously and 10,705 websites in the United States currently using Keen IO.