v2 of the Google reCAPTCHA system.
https://developers.google.com/recaptcha/docs/display
Widgets
Get access to data on 7,830,867 websites reCAPTCHA v2 Customers. We know of 2,921,549 live websites using reCAPTCHA v2 and an additional 4,909,318 sites that used reCAPTCHA v2 historically and 1,329,276 websites in the United States.
Get a list of 7,830,867 websites using reCAPTCHA v2 which includes location information, hosting data, contact details, 2,921,549 currently live websites and an additional 3,060,023 domains that redirect to sites in this list. 4,909,318 sites that used this technology previouslyand 1,329,276 websites in the United States currently using reCAPTCHA v2.
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