Anti-bot CAPTCHA widget from Google.
https://www.google.com/recaptcha/intro/index.html
Widgets · CAPTCHA
Get access to data on 37,247,731 websites that are reCAPTCHA Customers. We know of 11,531,749 live websites using reCAPTCHA and an additional 25,715,982 sites that used reCAPTCHA historically and 1,944,368 websites in the United States.
reCAPTCHA websites that are also using other technologies.
Get a list of 37,247,731 websites using reCAPTCHA which includes location information, hosting data, contact details, 11,531,749 currently live websites and an additional 3,524,273 domains that redirect to sites in this list. 25,715,982 sites that used this technology previouslyand 1,944,368 websites in the United States currently using reCAPTCHA.
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