Email people automatically based on what they do (or don't do) in your app.
https://customer.io/
Analytics and Tracking · Marketing Automation
Get access to data on 42,131 websites that are Customer.io Customers. We know of 16,236 live websites using Customer.io and an additional 25,895 sites that used Customer.io historically and 9,988 websites in the United States.
Get a list of 42,131 websites using Customer.io which includes location information, hosting data, contact details, 16,236 currently live websites and an additional 38,119 domains that redirect to sites in this list. 25,895 sites that used this technology previouslyand 9,988 websites in the United States currently using Customer.io.
Countries
Financial
Group
Region
These are sites that we think might use Customer.io in the future because of their similarity to other sites that already do.