reCAPTCHA
reCAPTCHA is Google's CAPTCHA service — image puzzles and invisible v3 scoring. Widely used, but with real privacy trade-offs and captcha-farm bypass problems.
What is reCAPTCHA?
reCAPTCHA is a free service provided by Google that helps protect websites from spam and abuse by using advanced risk analysis techniques to differentiate between human users and bots. It often presents users with interactive challenges, such as identifying objects in images or solving simple puzzles, to verify their humanity.