Progress Telerik UI for ASP.NET MVC
The Telerik UI for ASP.NET MVC Captcha is a smart verification component that serves as a security validator. It is used to protect your application from program or bot logins/submissions and ensure that a human is trying to access the information in your application. The control comes with built-in validation, Captcha Audio and can be easily integrated with the Form component.
The requests to the handler include Captcha refresh, Captcha audio and Captcha Validation.