ridhwanahsann

RMGCaptcha Math Guard adds a GDPR-friendly, math-based CAPTCHA to protect your forms from spam and brute force. No external services, no tracking, and fully WordPress.org compliant.
Features:
<ul>
<li>WordPress login protection (captcha on wp-login.php)</li>
<li>Contact Form 7 integration via [pmcMathcaptcha] / [pmcMathcaptcha*]</li>
<li>WooCommerce login and registration protection</li>
<li>Configurable difficulty and operations (Addition/Subtraction/Multiplication/Random)</li>
<li>Hide captcha for logged-in users</li>
<li>Custom error message support</li>
<li>Optional rate limiting and honeypot</li>
<li>Failed login log + logged user list (admin pages)</li>
<li>Translation-ready</li>
</ul>

RMGCaptcha Math Guard

A lightweight math CAPTCHA for WordPress login, Contact Form 7, and WooCommerce forms.

tuxlog

LazyCaptcha is a small and lazy plugin to prevent bots from spamming your comments. 
It generates a random image with an easy arithmetic task and checks if the result is correct after the comment is trasmitted. 
It stores the tasks and results in the WordPress database and deletes them after use or two times a day using a wp-cron job. 
It works perfectly on my sites, so I decided to publish it for others on WordPress.org.
<h3>Translations</h3>
LazyCaptcha comes in german and english. Feel free to translate it to other languages and send me the translation so I can include it into the translation repository

LazyCaptcha

LazyCaptcha is a small and lazy plugin to prevent bots from spamming your comments.

RMGCaptcha Math Guard vs LazyCaptcha