v2 of the Google reCAPTCHA system.
https://developers.google.com/recaptcha/docs/display
Widgets
Get access to data on 8,402,334 websites that are reCAPTCHA v2 Customers. We know of 2,355,928 live websites using reCAPTCHA v2 and an additional 6,046,406 sites that used reCAPTCHA v2 historically and 1,041,476 websites in the United States.
Get a list of 8,402,334 websites using reCAPTCHA v2 which includes location information, hosting data, contact details, 2,355,928 currently live websites and an additional 2,703,005 domains that redirect to sites in this list. 6,046,406 sites that used this technology previouslyand 1,041,476 websites in the United States currently using reCAPTCHA v2.
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