R. Sabbir

<p>BotShield CAPTCHA adds powerful yet simple CAPTCHA protection to your Contact Form 7 forms without requiring any third-party API keys or services. Keep your forms spam-free while maintaining complete user privacy.</p>
<h4>Features</h4>
<ul>
<li>Multiple CAPTCHA Types: Arithmetic challenges and alphanumeric image CAPTCHAs</li>
<li>Three Difficulty Levels: Easy, Medium, and Hard options to balance security and usability</li>
<li>No API Keys Required: Fully self-hosted solution with no external dependencies</li>
<li>WCAG 2.1 Accessible: Screen reader support and keyboard navigation included</li>
<li>Mobile Responsive: Perfect display on all devices and screen sizes</li>
<li>Three Built-in Themes: Default, Minimal, and Modern styles</li>
<li>GDPR Compliant: No data collection or third-party transmission</li>
<li>Lightweight: Minimal performance impact on your site</li>
<li>Auto-Refresh Option: Optional automatic CAPTCHA regeneration</li>
<li>Translation Ready: Full internationalization support with RTL language support</li>
</ul>
<h4>CAPTCHA Types</h4>
<p><strong>Arithmetic CAPTCHA</strong><br />
Simple math problems that are easy for humans but difficult for bots.<br />
* Easy: Addition/subtraction with numbers 1-10<br />
* Medium: Addition/subtraction with numbers 1-20<br />
* Hard: Addition, subtraction, and multiplication with numbers 1-50</p>
<p><strong>Alphanumeric Image CAPTCHA</strong><br />
Distorted text images with case-sensitive characters.<br />
* Easy: 4 character challenge<br />
* Medium: 5 character challenge<br />
* Hard: 7 character challenge</p>
<h4>Perfect For</h4>
<ul>
<li>Contact forms</li>
<li>Registration forms</li>
<li>Quote request forms</li>
<li>Newsletter signups</li>
<li>Any form needing spam protection</li>
</ul>
<h4>Security & Privacy</h4>
<ul>
<li>Token-based validation with HMAC signatures</li>
<li>Time-based expiration (5 minutes)</li>
<li>No external API calls</li>
<li>No data collection or storage</li>
<li>GDPR compliant</li>
<li>Fully self-hosted on your server</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>WordPress 5.0 or higher</li>
<li>Contact Form 7 plugin (must be active)</li>
<li>PHP 7.4 or higher</li>
<li>GD PHP extension for image CAPTCHAs</li>
</ul>
<h3>Privacy Policy</h3>
<p>BotShield CAPTCHA does not:<br />
* Collect any personal data<br />
* Store user information<br />
* Transmit data to external servers<br />
* Use cookies or tracking<br />
* Share information with third parties</p>
<p>All CAPTCHA processing happens locally on your WordPress server. The plugin is fully GDPR compliant.</p>
<h3>Support & Documentation</h3>
<ul>
<li>Support Forum: https://wordpress.org/support/plugin/botshield-captcha/</li>
<li>Developer Website: https://www.rsabbir.com/</li>
</ul>
<h3>Contributing</h3>
<p>Contributions are welcome! Contact the developer or visit the GitHub repository to contribute to this plugin’s development.</p>
<h3>Credits</h3>
<ul>
<li>Developed by R. Sabbir (https://www.rsabbir.com/)</li>
<li>SVG icons included (no external icon dependencies)</li>
<li>Tested with Contact Form 7 5.8 and later</li>
</ul>
<h3>Technical Specifications</h3>
<h4>Server Requirements</h4>
<ul>
<li>WordPress 5.0 or higher</li>
<li>PHP 7.4 or higher</li>
<li>Contact Form 7 plugin (active)</li>
<li>GD PHP extension (for image CAPTCHAs)</li>
</ul>
<h4>Browser Support</h4>
<ul>
<li>Chrome (latest versions)</li>
<li>Firefox (latest versions)</li>
<li>Safari (latest versions)</li>
<li>Microsoft Edge (latest versions)</li>
<li>Mobile browsers (iOS Safari, Chrome Mobile)</li>
</ul>
<h4>Security Features</h4>
<ul>
<li>Token-based validation system</li>
<li>HMAC-SHA256 signature verification</li>
<li>Automatic token expiration (5 minutes)</li>
<li>XSS protection</li>
<li>CSRF token protection</li>
<li>No session storage required</li>
</ul>
<h4>Performance</h4>
<ul>
<li>Code: ~50KB total size</li>
<li>Assets: Minified and optimized</li>
<li>Loading: Conditional asset loading on relevant pages</li>
<li>HTTP Requests: Zero external requests</li>
<li>Caching: Compatible with all major WordPress cache plugins</li>
</ul>


BotShield CAPTCHA for Contact Form 7

Add simple CAPTCHA protection to Contact Form 7 forms. No API keys required! Prevent spam with arithmetic or image-based challenges.

Matthias Pfefferle

Bernhard Kau

Pascal Birchler

Simon Kraft

pluginkollektiv

websupporter

Torsten Landsiedel

Florian Brinkmann

Alain Schlesser

<p>Say Goodbye to comment spam on your WordPress blog or website. <em>Antispam Bee</em> blocks spam comments and trackbacks effectively, without captchas and without sending personal information to third party services. It is free of charge, ad-free and 100% GDPR compliant.</p>
<h3>Feature/Settings Overview</h3>
<ul>
<li>Trust approved commenters.</li>
<li>Trust commenters with a Gravatar.</li>
<li>Consider the comment time.</li>
<li>Allow comments only in a certain language.</li>
<li>Block or allow commenters from certain countries.</li>
<li>Treat BBCode links as spam.</li>
<li>Use regular expressions.</li>
<li>Search local spam database for commenters previously marked as spammers.</li>
<li>Notify admins by e-mail about incoming spam.</li>
<li>Delete existing spam after n days.</li>
<li>Limit approval to comments/pings (will delete other comment types).</li>
<li>Select spam indicators to send comments to deletion directly.</li>
<li>Optionally exclude trackbacks and pingbacks from spam detection.</li>
<li>Optionally spam-check comment forms on archive pages.</li>
<li>Display spam statistics on the dashboard, including daily updates of spam detection rate and a total of blocked spam comments.</li>
</ul>
<h3>Support</h3>
<ul>
<li>Community support via the <a href="https://wordpress.org/support/plugin/antispam-bee" rel="ugc">support forums on wordpress.org</a></li>
<li>Read <a href="https://antispambee.pluginkollektiv.org/documentation/" rel="nofollow ugc">the documentation</a></li>
<li>We don’t handle support via e-mail, Twitter, GitHub issues etc.</li>
</ul>
<h3>Contribute</h3>
<ul>
<li>Active development of this plugin is handled <a href="https://github.com/pluginkollektiv/antispam-bee" rel="nofollow ugc">on GitHub</a>.</li>
<li>Pull requests for documented bugs are highly appreciated.</li>
<li>If you think you’ve found a bug (e.g. you’re experiencing unexpected behavior), please post at the <a href="https://wordpress.org/support/plugin/antispam-bee" rel="ugc">support forums</a> first.</li>
<li>If you want to help us translate this plugin you can do so <a href="https://translate.wordpress.org/projects/wp-plugins/antispam-bee" rel="nofollow ugc">on WordPress Translate</a>.</li>
</ul>
<h3>Credits</h3>
<ul>
<li>Author: <a href="https://sergejmueller.github.io/" rel="nofollow ugc">Sergej Müller</a></li>
<li>Maintainers: <a href="https://pluginkollektiv.org" rel="nofollow ugc">pluginkollektiv</a></li>
</ul>


Antispam Bee


Using it since years and had no spam in my blog ever. Simple, clean, works.


Best Antispam Plugin


I've tested this plugin and seems to working very well. Most spam comments are gone, some of them (just a little) are able to avoid spam filters.



There is something need to be fixed and I'm already posted in support forum. I hope that it will be fixed soon.


Very good spam filter plugin.


Works quite well without calling out to a remote service, and doesn't require your visitors to be using JavaScript. (Seriously, I posted a test comment using Dillo and it showed up in the moderation queue!) No need to deal with API keys or licensing.



There are some optional tactics that will call a remote service for things like language identification, but so far it's doing the job fine without them!



The only problem I've had with it is that it only acts on comments, not on other features like contact forms.


Privacy-friendly spam filter

Sophisticated antispam plugin for effective daily comment and trackback spam-fighting. Built with data protection and privacy in mind.

BotShield CAPTCHA for Contact Form 7 vs Antispam Bee