You can read more detailed info in our Help Center for both platforms here:
https://www.ning.com/help/captcha-no-bots-spammy-content/
https://www.ning.com/ning3h…/captcha-no-bots-spammy-content/

We use latest version of reCaptcha form Google which uses an advanced risk analysis engine and adaptive CAPTCHAs to keep automated software from engaging in abusive activities on your network. It does this while letting your valid users pass through with ease. Read more about Google CAPTCHA here - https://www.google.com/recaptcha/intro/index.html…