Follow Button to your website to increase engagement and create a lasting connection with your audience.
https://twitter.com/about/resources/buttons#follow
Widgets
Get access to data on 1,395,225 websites that are Twitter Follow Button Customers. We know of 288,554 live websites using Twitter Follow Button and an additional 1,106,671 sites that used Twitter Follow Button historically and 167,014 websites in the United States.
Get a list of 1,395,225 websites using Twitter Follow Button which includes location information, hosting data, contact details, 520,560 currently live websites which includes 232,006 domains that redirect to sites in the list. 1,106,671 sites that used this technology previously and 167,014 websites in the United States currently using Twitter Follow Button.