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.

Web Guy

<p>Dam Spam is a comprehensive spam protection plugin that blocks spam registrations, login attempts, comments, and contact form submissions. It provides multiple layers of protection including IP blocking, email validation, CAPTCHA challenges, and integration with third-party spam detection services.</p>
<p><strong>How it Works</strong></p>
<p>Dam Spam runs a series of configurable checks on registrations, logins, comments, and form submissions. When a submission is flagged as potentially suspicious, you can choose to block it outright or present a CAPTCHA challenge. Legitimate users are cached to speed up future submissions, while known spam sources are permanently blocked.</p>
<p><strong>Features</strong></p>
<ul>
<li><strong>Multiple Protection Layers</strong> – Block spam using IP lists, disposable email detection, and behavioral analysis</li>
<li><strong>CAPTCHA Support</strong> – Integrate with Google reCAPTCHA or hCaptcha to challenge suspicious submissions</li>
<li><strong>Third-Party API Integration</strong> – Connect with Akismet, Stop Forum Spam, BotScout, and other spam detection services</li>
<li><strong>Customizable Challenges</strong> – Present challenges only to suspicious users while allowing legitimate users through</li>
<li><strong>Allow and Block Lists</strong> – Maintain custom lists of allowed and blocked IPs, emails, and user IDs</li>
<li><strong>Smart Caching</strong> – Cache known good and bad IPs to improve performance and reduce API calls</li>
<li><strong>Comprehensive Logging</strong> – Track all blocked attempts and approved submissions for review</li>
<li><strong>Custom Login/Registration Forms</strong> – Optional custom forms with built-in spam protection</li>
<li><strong>User Management</strong> – Identify and manage inactive or suspicious user accounts</li>
</ul>
<p><strong>Configuration</strong></p>
<p>After installation, go to the Dam Spam settings in your WordPress admin to:</p>
<ol>
<li>Enable the protection types you need (registration, login, comments, contact forms)</li>
<li>Choose which spam detection methods to use (IP checks, email validation, third-party APIs)</li>
<li>Configure CAPTCHA settings if desired</li>
<li>Set up allow and block lists for your specific needs</li>
<li>Review logs to fine-tune your protection settings</li>
</ol>
<p><strong>Differences from Stop Spammers</strong></p>
<p>Dam Spam is a fork of the Stop Spammers plugin with ongoing maintenance, bug fixes, and security improvements. While the core spam protection functionality remains similar, Dam Spam’s file and code structure has been significantly cleaned up and will continue to be further modernized.</p>


Dam Spam

Comprehensive spam protection for WordPress registration, login, comments, and contact forms.

BotShield CAPTCHA for Contact Form 7 vs Dam Spam