hCaptcha

hCaptcha is a captcha software that can be used by websites and apps as protection against bots and span. hCaptcha is designed from the ground up to solve intensive machine learning problems while at the same time to protect properties. With hCaptcha, user inputs are used in the training of machine learning models for image recognition. Automatically solving two problems with one solution, and allowing no user inputs to be wasted as meaningless chores.