Automattic

Donncha O Caoimh (a11n)

This plugin adds a stylesheet or image to your blog’s html source code. When a browser loads that stylesheet or image a cookie is dropped. If that user then leaves a comment the cookie is checked. If it doesn’t exist the comment is marked as spam. 
The plugin can also check how long it took a user to enter a comment. If it’s too fast it’s probably a spam bot. How fast can a legitimate user enter their name, email, web address and enter a well thought out comment?
For the adventurous, add these lines to your .htaccess and it will block spam attempts before they ever get to WordPress. Replace the Xs with the cookie that was set in your browser after viewing your blog. You can also find the cookie value by examining the page source code and looking for “css.php?k=XXXXXXXXXXXXXXXXXXX”. Make sure the lines go above the standard WordPress rules.
<pre><code> RewriteCond %{HTTP_COOKIE} !^.*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.*$
 RewriteRule ^wp-comments-post.php - [F,L]
</code></pre>
If you use WordPress MU, replace wp-comments-post.php above with wp-signup.php to block spam signups.
<pre><code> RewriteCond %{HTTP_COOKIE} !^.*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.*$
 RewriteRule ^wp-signup.php - [F,L]
</code></pre>

Cookies for Comments

If you don't use any other spam filter plugins, then you can rely on this to stop spam comments for sure!

Must have, if you don't use any other spam filters!

I'd been getting a dozen spams a day on two of my sites. We installed "Stop Spam Comments" on one and "Cookies for Comments" on the other. Both worked perfectly. No more spam. Thanks!



very easy and no more spam!

Sets a cookie on a random URL that is then checked when a comment is posted. If the cookie is missing the comment is marked as spam.

Humanityco

Cookie Notice provides a simple, customizable website banner that can be used to help your website comply with certain cookie consent requirements under the EU GDPR cookie law and CCPA regulations and includes seamless integration with Cookie Compliance to help your site comply with the latest updates to existing consent laws.
Cookie Compliance is a fully featured Consent Management Platform (CMP) that provides automated compliance features and enhanced design controls in a state-of-the-art web application. Cookie Compliance enables websites to take a proactive approach to data protection and consent laws. It is the first solution to offer Intentional Consent, a new consent framework that incorporates the latest guidelines from over 100+ countries, and emerging standards from leading international organizations like the IEEE and European Center for Digital Rights (noyb.eu). Cookie Compliance provides a beautiful, multi-level experience and includes new choices and controls for site visitors to better understand and engage in data privacy decisions.
<blockquote>
Our Cookie Compliance web application introduces a more ethical, proactive way to capture and manage consent. This early version of the emerging Intentional Consent framework is a result of Hu-manity.co’s ongoing work with top Fortune 500 companies, governments, and standards organizations, who believe that the imbalanced relationship between consumers and corporations is unsustainable when it comes to data privacy and consent online. We are making it available for all website owners and operators who share this belief and support our mission to eliminate the dark patterns in online consent. 
 Matt Sinderbrand – Chief Platform Officer, Hu-manity.co
</blockquote>
<h3>Cookie Notice (plugin only)</h3>
Cookie Notice provides a simple, customizable website banner to help your website comply with certain cookie consent requirements.
<h4>Banner features:</h4>
<ul>
<li>Customizable notice message</li>
<li>Consent on click, scroll or close</li>
<li>Multiple cookie expiry options</li>
<li>Link to Privacy Policy page</li>
<li>WordPress Privacy Policy page synchronization</li>
<li>WPML and Polylang compatible</li>
<li>SEO friendly</li>
</ul>
<h3>Cookie Compliance (plugin + web application)</h3>
Cookie Compliance gives you access to the most up-to-date formatting guidelines and technical compliance requirements for over 100 countries and legal jurisdictions.
<h4>Banner features:</h4>
<ul>
<li>Intentional Consent provides 3 equal buttons to give site visitors the ability to accept none, some, or all cookies through packaged choices called Data Access Levels. Data Access Levels improve consent conversion and eliminate the dark pattern of deceptive, non-equal choices in the first layer. Complies with equal choice principle prescribed under GDPR and other data protection laws.</li>
<li>Consent duration selector gives visitor control over how long their consent remains valid for your site. Enables your site to align with recent guidelines from EU Data Protection Authorities, which state that cookie consent should be valid for no longer than a period of 6 months.</li>
<li>Cookie purpose categories make it easy for website visitors to customize their consent by category. Complies with affirmative, opt-in consent requirements prescribed under GDPR and other data protection laws.</li>
<li>Consent metrics displays the visitor’s consent record and a list of blocked / allowed 3rd parties directly in the expanded level of the banner. Complies with latest guidance from EU Data Protection Authorities like CNIL (France) and ICO (UK). </li>
<li>Customizable Privacy Paper provides helpful information to improve visitor comprehension and understanding of the data sharing risks and benefits. Allows you to summarize core components of your sites privacy notice and aligns with the informed principle prescribed by GDPR rules for valid consent capture. </li>
<li>Configurable Privacy Contact allows you to provide contact information for a business’ data privacy admin, as well as helpful links to data subject request forms and other data privacy resources. Aligns with the informed principle prescribed by GDPR rules for valid consent capture.</li>
</ul>
<h4>Web Application features:</h4>
<ul>
<li>Consent analytics dashboard shows event data for number of visits and provides a “trust score” to help you track how site visitors are setting their consent. Make adjustments to your banner to improve your cookie acceptance rate and monitor progress via the consent activity graph.</li>
<li>Default configurations for GDPR, CCPA and more help to remove dark patterns and allow for quick and easy deployment of the consent banner without any guesswork. Customize the design of any default configuration to match the look and feel of your site.</li>
<li>Automatic script blocking blocks all non-essential cookie scripts and iFrames by default and complies with valid consent rules under GDPR and other data protection laws; in order to be compliant, your site must record visitor consent before setting or sending cookies.</li>
<li>Google Consent Mode ensures that your website can still gather valuable insights and perform effectively while respecting users’ privacy preferences by dynamically adjusting the behavior of Google services according to user consent.</li>
<li>Facebook Consent Mode allows your website to measure the impact of your ads on Facebook, track website activities and conversions and automatically deliver ads to Facebook if the user has agreed to.</li>
<li>Consent record storage automatically stores a record of each consent and makes these records available for export. Complies with proof-of-consent requirements prescribed under GDPR and other data protection laws.</li>
<li>Multilingual support automatically translates all banner text strings and allows you to provide custom translations for every text field to ensure visitors get a consistent consent experience.</li>
<li>Multidomain management allows you to manage additional Free or Professional domains under a single account and enables you to customize banner configuration and design for each domain independently.</li>
</ul>
<h4>Cookie Compliance proactive approach:</h4>
For all businesses, the resources required to stay ahead of the latest regulations increases with the passage of each new law. With enforcement of compliance violations increasing daily, we believe it is critical for us as a trusted consent vendor to do everything in our power to help you stay ahead of these laws and remove the risk to your business
Cookie Compliance covers all current and upcoming regulations:
<ul>
<li>GDPR (EU)</li>
<li>ePrivacy Directive (EU)</li>
<li>ePrivacy Regulation (EU)</li>
<li>PECR (UK)</li>
<li>LGPD (Brazil)</li>
<li>PIPEDA (Canada)</li>
<li>PDPB (India)</li>
<li>CCPA (California, US)</li>
<li>VCDPA (Virginia, US)</li>
<li>Colorado Privacy Act (US)</li>
<li>CPRA (California, US)</li>
</ul>
Cookie Compliance incorporates all recent formatting guidance:
<ul>
<li>European Data Protection Supervisor (EDPS)</li>
<li>ICO (United Kingdom)</li>
<li>CNIL (France)</li>
<li>GPDP (Italy)</li>
<li>BfDl (Germany)</li>
<li>AEPD (Spain)</li>
<li>European Center for Digital Rights (noyb.eu)</li>
</ul>
Cookie Compliance targets dark patterns
Dark Patterns are user interface (UI) techniques that push site visitors to make decisions (such as agreeing to the installation of cookies on their devices) that they might not otherwise make. The most common Dark Pattern is the lack of an equal “reject all” button on the first layer of the consent notice. Dark Patterns are explicitly banned under GDPR and other data protection laws.
As a part of our proactive approach, Cookie Compliance is configured by default to prevent Dark Patterns through our unique Intentional Consent design.

Cookie Notice & Compliance for GDPR / CCPA

So yeah it's pretty bad, not sure why it looks so popular

Crappy bloated software that adds huge unhidable ads on your whole dashboard


This plugin is culprit, like many others, of the same bad practice which consists of abusing admin notices and alerts to remind them to you, the admin. A good plugin is one that does it job and you forget about it. Adding a "ignore notification" that does absolutely nothing (class cn-notice-dismiss) is woth a systematic 1/5.


Some admin notices can't be hidden: stop bloating our admin interface

Cookie Notice allows you to you elegantly inform users that your site uses cookies and helps you comply with GDPR, CCPA and other data privacy laws.

Cookies for Comments vs Cookie Notice & Compliance for GDPR / CCPA