kasitoru

Unofficial Community Integration: 
This plugin is a community-made integration for the Yandex SmartCaptcha service. It is not developed, endorsed, or supported by Yandex.
Enhance your WordPress site’s security by integrating the powerful Yandex SmartCaptcha anti-bot system. This plugin allows you to easily add SmartCaptcha to your website forms to effectively combat spam and automated abuse.
How it works? 
This plugin acts as a bridge between your WordPress site and the external Yandex SmartCaptcha service. The smart system analyzes user behavior. If it resembles a bot, the user is prompted to solve a simple task. Real people often pass the check instantly and unnoticed.
What forms can you protect?
<ul>
<li>FREE: Comment form (ideal for blogs)</li>
<li>PRO: Invisible captcha</li>
<li>PRO: Login form (protection against password brute-force attacks)</li>
<li>PRO: Registration form (combat fake users)</li>
<li>PRO: Password recovery form</li>
<li>PRO: Access to the website is granted only after passing the captcha</li>
<li>PRO: Integration with third-party plugins:
<ul>
<li>Contact Form 7</li>
<li>WPForms (Lite & Pro)</li>
<li>Elementor Pro</li>
</ul>
</li>
</ul>
Your benefits:
<ul>
<li>Less spam: Clean comments and user database.</li>
<li>Better security: Protection against brute-force attacks and automated registrations.</li>
<li>Easy to use: Set up in 5 minutes with no programming skills required.</li>
</ul>
Start with the free protection for the comment form, and upgrade to a license if you need to unlock all the plugin’s advanced features!
This plugin is provided “as is” by an independent developer. For official information about Yandex SmartCaptcha, please visit <a href="https://cloud.yandex.com/en/services/smartcaptcha" rel="nofollow ugc">https://cloud.yandex.com/en/services/smartcaptcha</a>.
<h3>External services</h3>
This plugin connects to external APIs to analyze user behavior and retrieve information about the current license status.
It sends a digital fingerprint (signature) of the user’s behavior and their IP address every time one of the forms specified in the plugin settings is submitted. 
This service is provided by LLC “Yandex.Cloud”. 
Terms of Use: https://yandex.ru/legal/cloud_termsofuse 
Privacy Policy: https://yandex.ru/legal/confidential/
The current license status is checked upon user request (when saving the plugin settings) and then automatically every hour. 
The verification process transmits the value of the website’s domain and the license code specified in the plugin’s parameters. 
This service is provided by the plugin author via the digital service kasito.ru. 
Terms of Use: https://kasito.ru/user_agreement/ 
Privacy Policy: https://kasito.ru/privacy_policy/

Advanced SmartCaptcha

A plugin that helps protect your WordPress site forms from spam and bots using the Yandex SmartCaptcha service.

barpachuk

eranfl

clickcease

Bots and invalid traffic can reach your site through paid, organic, and direct traffic, resulting in a wasted ad budget and disrupted marketing funnels.
Prevent bots, competitors, and malicious users from damaging your marketing performance with ClickCease, the industry-leading service that keeps your website and ads safe from fraud. Quick installation and real-time protection for all your website’s incoming traffic.
ClickCease protects you from invalid traffic by monitoring and protecting your:
<ul>
<li>Paid traffic (Google, Facebook, & Microsoft)</li>
<li>Organic traffic</li>
<li>Direct traffic</li>
</ul>
Put a stop to ad and click fraud on your website with our market-leading AI software. Allow yourself to fully focus on growing your business without having online fraud distract you.
You will need an active ClickCease subscription to use this WordPress plugin.

ClickCease Click Fraud Protection

I'm not commenting on the ClickCease service - as far as I know, that's totally great, but this plugin is coded in the worst way imaginable. 

So much php processing and hogging of the output buffer unecessarily. 

Do not use this plugin. Just add the code to your theme's header manually. 

Worst Code Imaginable


Their support closes support requests without solving them


Strange service, no support, bad code

Protect your website and ad campaigns from bots, competitors, and click fraud with ClickCease's advanced fraud prevention and real-time monitoring.

Advanced SmartCaptcha vs ClickCease Click Fraud Protection