Captcha - reCaptcha Plugin
Protect User Registration & Contact Form
Joomla! is intrinsically spam proof.
And second, the Joomla! CMS includes an optional Captcha - reCaptcha Plugin to help stop bots from abusing the Contact Form (when published).
User Registration (when activated) can also be protected.
Use of the Captcha - reCaptcha Plugin requires a Google account.
User Login is not protected by the Captcha - reCaptcha Plugin.
Nor are Password Reset and Reminder Fields.
The Captcha - reCaptcha Plugin is disabled by default in a WYNCHCO Website Design.
Reason: its use requires Captcha Keys.
You can acquire Captcha Keys when you visit the following link and select GET STARTED.
Note: The Plugin works using reCaptcha v2 Captcha Keys,
Scroll down the screen when you visit the above link to view pricing.
At the time of writing reCaptcha v2 Captcha Keys can be used for free for up to 1 million 'assessments' per month.
This could change of course.
And it should be noted that some 3rd party extension developers enable you to use alternative Captcha - reCaptcha Key providers.