John Dalesandro

The Analytical Spam Filter plugin for WordPress blocks comment, trackback, and pingback spam. It uses multiple spam detection methods without challenging the user with obstacles such as captchas, math problems, etc. and it does not rely on external services or APIs. This is a low overhead plugin that begins blocking spam as soon as it is activated. It is compatible with caching plugins as long as the user has JavaScript enabled. The plugin blocks spam submitted through the default WordPress comment form only.
Logic is used to identify spam comment submissions. No user interaction is required. The spam blocking mechanisms work transparently behind the scenes. Most visitors will require longer than a few seconds to read a post and add a meaningful comment so any comments submitted within a short time threshold are identified as spam. Comments containing a large number of links are flagged as spam. The plugin uses an encrypted code and a honeypot to filter robotic submissions. All field names added by the plugin are randomized to prevent detection based on a source code signatures.
Configuration options include:
<ul>
<li>Enable Cache Compatibility (requires JavaScript)</li>
<li>Add spam to WordPress queue or block completely</li>
<li>Send diagnostic information to site administrator</li>
<li>Automatically compatible with the Micro Contact Form plugin to block spam messages.</li>
</ul>
Blocking options include:
<ul>
<li>Honeypot Trap</li>
<li>Randomized Internal Field Names</li>
<li>Timestamps (minimum and maximum entry time)</li>
<li>Aggressively check for excessive URLs</li>
<li>Check if JavaScript is enabled</li>
<li>Automatically block repeated spam from IP</li>
<li>Automatically block repeated spam based on content</li>
<li>Require User Agent string</li>
<li>Require Referer</li>
<li>Block Trackbacks</li>
<li>Block Pingbacks</li>
</ul>

Analytical Spam Filter

Block WordPress comment spam, trackback spam, and pingback spam through intelligent analytics instead of interactive challenge response tests.

teamtp

Anti-Spam Filter for Gravity Forms is a lightweight yet powerful tool designed to protect your Gravity Forms from spam submissions. This plugin integrates seamlessly with Gravity Forms and adds advanced anti-spam features to your form submissions.
Important: This plugin requires Gravity Forms 2.5 or higher to function properly.
The plugin automatically detects and filters out spam submissions based on customizable settings. It ensures that only legitimate entries are received by your forms. Whether you’re dealing with keyword-based spam, Cyrillic text, or want to add an extra layer of security, this plugin has you covered.
Key Features: 
– Gravity Forms Integration: Works seamlessly with Gravity Forms to protect your forms from spam. 
– Keyword-Based Spam Filtering: Block form submissions containing specified keywords you define. 
– Cyrillic Text Detection: Automatically filter out submissions with Cyrillic characters, commonly used in spam. 
– Customizable Subject Prefix: Add a customizable prefix (e.g., “SPAM Alert”) to flagged form submissions. 
– Multiple Form Protection: Specify which Gravity Forms to protect by defining form IDs. 
– Simple Configuration: Easy-to-use interface with toggle switches to enable or disable features.
Ensure your Gravity Forms stay clean, secure, and spam-free with Anti-Spam Filter for Gravity Forms.
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. See the full license at <a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">https://www.gnu.org/licenses/gpl-2.0.html</a>.

Anti-Spam Filter for Gravity Forms

A lightweight anti-spam solution for Gravity Forms that blocks unwanted submissions using keyword filtering and Cyrillic text detection.

Analytical Spam Filter vs Anti-Spam Filter for Gravity Forms