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 285,011 websites that are Pingdom RUM Customers. We know of 19,744 live websites using Pingdom RUM and an additional 265,267 sites that used Pingdom RUM historically and 9,897 websites in the United States.
Get a list of 285,011 websites using Pingdom RUM which includes location information, hosting data, contact details, 19,744 currently live websites and an additional 140,725 domains that redirect to sites in this list. 265,267 sites that used this technology previouslyand 9,897 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.