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 29,340 websites Customer.io Customers. We know of 7,245 live websites using Customer.io and an additional 22,095 sites that used Customer.io historically and 4,335 websites in the United States.
Get a list of 29,340 websites using Customer.io which includes location information, hosting data, contact details, 7,245 currently live websites and an additional 28,957 domains that redirect to sites in this list. 22,095 sites that used this technology previouslyand 4,335 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.