Radek Mezulanik

This plugin:
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Add 3 hidden fields to Registration form and to Comments form, that only robots can see. Plus you can choose to add validation checkbox to forms.
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Add to .htaccess file direct access protection for comments file.
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<li>
Check time user spent on page and time when user send a form.
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<li>
Disable trackbacks for past and future posts.
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Additionally you can choose to add validation checkbox to forms.

Antispam Revolution

Three way antispam protection for registration and comment forms.

POWER CAPTCHA

<h4>STOP BOT AND HACKER ATTACKS</h4>
Safeguard your website’s forms and login areas from misuse, spam, and data theft caused by both bots AND hackers. POWER CAPTCHA uses customizable parameters to verify whether access is legitimate, either granting or denying access based on your chosen criteria.
<h4>MORE THAN JUST BOT PROTECTION</h4>
While many captchas only focus on stopping bots, they often fail to guard against unauthorized access by real users, such as someone repeatedly trying to guess login credentials or submitting forms multiple times. POWER CAPTCHA goes beyond traditional bot detection by evaluating all interactions, regardless of whether they’re human or automated. It uses flexible criteria — e.g. usernames, email addresses, IP addresses, and/or login attempts within specific timeframes — to assess if access is genuinely authorized.
Each interaction generates an encrypted code, or “client footprint”, which POWER CAPTCHA stores and analyzes. For future attempts, it can, for example, increase the challenge level or temporarily block further actions. With customizable settings based on your license, POWER CAPTCHA adapts to your specific security needs. You can also configure it as a no-captcha option.
<h4>GDPR-COMPLIANT, ACCESSIBLE, AND BUILT IN GERMANY</h4>
POWER CAPTCHA is cookie-free, GDPR-compliant, and easy to integrate with most systems. For added security and accessibility, the Enterprise Plan includes features like two-factor authentication.
<h4>Supported Plugins and Forms</h4>
<ul>
<li>WordPress Login</li>
<li>WordPress Registration</li>
<li>WordPress Lost Password</li>
<li>WooCommerce Login</li>
<li>WooCommerce Registration</li>
<li>WooCommerce Lost Password</li>
<li>WooCommerce Checkout</li>
<li>WPForms</li>
<li>WPForms lite</li>
<li>Elementor Pro Forms</li>
<li>Contact Form 7</li>
</ul>

POWER CAPTCHA protects your WordPress website and WordPress forms against bots and unauthorized persons. GDPR compliant!

Antispam Revolution vs POWER CAPTCHA