datumbox

The Machine Learning Antispam Plugin uses Machine Learning to detect spam and adult content comments and mark them as spam. Additionally it allows you to filter negative comments and keep them pending for approval.
It uses the Datumbox API 1.0v and is compatible with WordPress 3.6v or higher.
To read more about how it works, how it should be configured etc check out the original blog post: 
http://blog.datumbox.com/how-to-build-an-intelligent-antispam-wordpress-plugin/
<h3>Useful Links</h3>
Datumbox Website: http://www.datumbox.com/
Download API Documentation and Code Samples: http://www.datumbox.com/machine-learning-api/
Sign-up for free API Key: http://www.datumbox.com/users/register/
View your API Key: http://www.datumbox.com/apikeys/view/

Machine Learning Antispam

The Machine Learning Antispam Plugin uses Machine Learning to detect spam and adult content comments and mark them as spam.

vøiddo

tells is a text-first analysis widget that reads between the lines of any message. Coaches, mediators, communication trainers, recruiters, and intake teams add it to a WordPress page or post so that clients can analyze their own messages — or so that practitioners can surface signals before a session begins.
Two modes are included:
<ul>
<li>Public demo widget — free, no account required. Useful for articles, landing pages, and audience education.</li>
<li>Licensed practitioner widget — paid white-label embed. Client-data privacy controls, higher analysis volume, and your branding. Requires a tells embed license from tells.voiddo.com.</li>
</ul>
The plugin includes a shortcode, a dynamic Gutenberg block, and a settings page. It does not analyze content inside WordPress and does not send post content to tells. It only renders the widget where you place it.
<h4>Shortcode</h4>
Use the site-wide settings:
<pre><code>[tells_widget]
</code></pre>
Force public demo mode:
<pre><code>[tells_widget mode="public" height="700"]
</code></pre>
Use a licensed embed for one page:
<pre><code>[tells_widget mode="licensed" license="paste-license-here" height="760"]
</code></pre>
<h4>Block</h4>
The plugin registers a dynamic block named tells widget. The block lets you choose plugin settings, public demo mode, or licensed mode per page.
<h3>External Services</h3>
This plugin connects to the tells service at <code>https://tells.voiddo.com</code>.
What data is sent and when:
In public mode the widget loads a sandboxed iframe from <code>https://tells.voiddo.com/embed/message-analyzer.html</code>. Text entered by a visitor inside that iframe is submitted by the iframe directly to tells for analysis. No WordPress data is involved.
In licensed mode the plugin’s frontend JavaScript sends the configured embed license key, the current site hostname, and the browser user-agent string to <code>https://tells.voiddo.com/api/v1/embed/init</code> to obtain a short-lived session token. The analysis widget then runs inside a sandboxed iframe at <code>https://tells.voiddo.com/embed/iframe</code>.
What is NOT sent: WordPress post content, page content, comments, users, admin credentials, or any database rows are never sent to tells by this plugin.
Service terms and privacy:
<ul>
<li>Product page: https://tells.voiddo.com/</li>
<li>Privacy policy: https://tells.voiddo.com/en/privacy</li>
<li>Terms of service: https://tells.voiddo.com/en/terms</li>
</ul>
<h3>About</h3>
Built by vøiddo — a small studio shipping tools, browser extensions, games, and WordPress plugins.

tells — Text Analysis Widget

Free WordPress plugin for careful message analysis on coaching, mediation, recruiting, and client-intake pages. Add a public demo or licensed white-la …

Machine Learning Antispam vs tells — Text Analysis Widget