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 809,260 websites that are reCAPTCHA v3 Customers. We know of 647,915 live websites using reCAPTCHA v3 and an additional 161,345 sites that used reCAPTCHA v3 historically and 277,215 websites in the United States.
Get a list of 809,260 websites using reCAPTCHA v3 which includes location information, hosting data, contact details, 647,915 currently live websites and an additional 682,199 domains that redirect to sites in this list. 161,345 sites that used this technology previously and 277,215 websites in the United States currently using reCAPTCHA v3.