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.

andreyberestov

Berestov Anti-spam for Contact Form 7 adds a lightweight, privacy-friendly anti-spam layer without modifying Contact Form 7 core files.
Features:
<ul>
<li>Layered anti-spam protection designed for real-world form traffic.</li>
<li>Fresh protection data can be refreshed on rendered forms, which helps on cached pages.</li>
<li>Front-end assets load only where protected forms are present.</li>
<li>Optional diagnostic logging to the plugin log file.</li>
<li>Built-in statistics for allowed and blocked requests.</li>
<li>Optional WordPress comment protection module.</li>
</ul>

Berestov Anti-spam for Contact Form 7

Protect Contact Form 7 and optionally WordPress comments with privacy-friendly anti-spam protection.

Advanced SmartCaptcha vs Berestov Anti-spam for Contact Form 7