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 32,783 websites that are Customer.io Customers. We know of 11,931 live websites using Customer.io and an additional 20,852 sites that used Customer.io historically and 8,166 websites in the United States.
Get a list of 32,783 websites using Customer.io which includes location information, hosting data, contact details, 11,931 currently live websites and an additional 28,242 domains that redirect to sites in this list. 20,852 sites that used this technology previously and 8,166 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.