Example demonstration of SMS based captcha
Captchas protect websites against automated submissions and malicious software. With a SMS Captcha, the user will be required to verify their mobile phone number before being able to submit the form. This ensures that a real human is submitting the form, and not an automated program.
SMS Arc provides a simple to integrate Captcha to protect websites from spam, Similar to Google ReCaptcha. With only a few lines of code, you can eliminate all spam from taking place on your website. Click to add SMS Captcha to Your Website.