On September 5, the Yandex SmartCaptcha verification service was made public. The console now offers it for all users, and the pricing rules and SLA are now in effect.
SmartCaptcha is a CAPTCHA solution with simple tests, flexible look and feel, and strong security. It can tell you if it’s a robot or a human trying to get by. You set a challenge level, and users either see an “I’m not a robot” field with a check box or go through a text-based CAPTCHA verification.
The service’s publicly available version also comes with a new way to connect: an invisible CAPTCHA. Skipping the “I’m not a robot” check, the text-based CAPTCHA only appears to users flagged by the algorithm as suspicious. You can read more about how to use the invisible CAPTCHA in the documentation.