Real User Monitoring gives insight into performance for actual users visiting the website.
https://www.pingdom.com/rum/
Analytics and Tracking · Application Performance
Get access to data on 307,909 websites that are Pingdom RUM Customers. We know of 29,899 live websites using Pingdom RUM and an additional 278,010 sites that used Pingdom RUM historically and 18,654 websites in the United States.
Get a list of 307,909 websites using Pingdom RUM which includes location information, hosting data, contact details, 29,899 currently live websites and an additional 211,249 domains that redirect to sites in this list. 278,010 sites that used this technology previously and 18,654 websites in the United States currently using Pingdom RUM.
Countries
Financial
Group
Region
These are sites that we think might use Pingdom RUM in the future because of their similarity to other sites that already do.