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 299,027 websites Pingdom RUM Customers. We know of 29,348 live websites using Pingdom RUM and an additional 269,679 sites that used Pingdom RUM historically and 18,309 websites in the United States.
Get a list of 299,027 websites using Pingdom RUM which includes location information, hosting data, contact details, 29,348 currently live websites and an additional 188,744 domains that redirect to sites in this list. 269,679 sites that used this technology previouslyand 18,309 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.