Anti-bot CAPTCHA widget from Google.
https://www.google.com/recaptcha/intro/index.html
Widgets · CAPTCHA
Get access to data on 27,619,005 websites that are reCAPTCHA Customers. We know of 12,759,403 live websites using reCAPTCHA and an additional 14,859,602 sites that used reCAPTCHA historically and 2,065,841 websites in the United States.
reCAPTCHA websites that are also using other technologies.
Get a list of 27,619,005 websites using reCAPTCHA which includes location information, hosting data, contact details, 12,759,403 currently live websites and an additional 2,961,467 domains that redirect to sites in this list. 14,859,602 sites that used this technology previously and 2,065,841 websites in the United States currently using reCAPTCHA.
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