Web push notifications.
https://www.webpushr.com
Widgets · Push Notifications
Get access to data on 4,795 websites that are Webpushr Customers. We know of 4,230 live websites using Webpushr and an additional 565 sites that used Webpushr historically and 2,255 websites in the United States.
Get a list of 4,795 websites using Webpushr which includes location information, hosting data, contact details, 4,230 currently live websites and an additional 4,150 domains that redirect to sites in this list. 565 sites that used this technology previously and 2,255 websites in the United States currently using Webpushr.