Many types of CAPTCHA systems can be defeated with machine learning models and OCR. Google provides its own called Google Vision API. Here is a brief example ho

Many types of CAPTCHA systems can be defeated with machine learning models and OCR. Google provides its own called Google Vision API. Here is a brief example how this is done in practice: https://blog.websecurify.com/2017/10/cracking-captchas.html https://blog.websecurify.com/2017/10/cracking-captchas.html Perhaps this is an old news as this technique has been out for a while but I find that it is still relevant in the many cases I have encountered. Furthermore, in my experience, I attribute Google's failure to improve reCAPTCHA's "I am not a robot" visual appeal as one of the key factors why many organisations are simply not using it.