eCAPTCHA v3 returns a score for each request without user friction.
https://developers.google.com/recaptcha/docs/v3
Widgets · CAPTCHA
Get access to data on 3,967,468 websites that are reCAPTCHA v3 Customers. We know of 1,167,413 live websites using reCAPTCHA v3 and an additional 2,800,055 sites that used reCAPTCHA v3 historically and 522,755 websites in the United States.
Get a list of 3,967,468 websites using reCAPTCHA v3 which includes location information, hosting data, contact details, 1,167,413 currently live websites and an additional 1,436,368 domains that redirect to sites in this list. 2,800,055 sites that used this technology previously and 522,755 websites in the United States currently using reCAPTCHA v3.
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