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 42,323 websites that are Customer.io Customers. We know of 17,087 live websites using Customer.io and an additional 25,236 sites that used Customer.io historically and 10,672 websites in the United States.
Get a list of 42,323 websites using Customer.io which includes location information, hosting data, contact details, 17,087 currently live websites and an additional 38,916 domains that redirect to sites in this list. 25,236 sites that used this technology previouslyand 10,672 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.