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 1,134,401 websites that are reCAPTCHA v3 Customers. We know of 862,487 live websites using reCAPTCHA v3 and an additional 271,914 sites that used reCAPTCHA v3 historically and 396,985 websites in the United States.
Get a list of 1,134,401 websites using reCAPTCHA v3 which includes location information, hosting data, contact details, 862,487 currently live websites and an additional 689,302 domains that redirect to sites in this list. 271,914 sites that used this technology previously and 396,985 websites in the United States currently using reCAPTCHA v3.