manfer

Contact Form 7 is an excellent WordPress plugin but its captcha functionality is limited to a simple captcha.
CF7 BWP reCAPTCHA Plugin adds reCAPTCHA capabilities to contact form 7.
This plugin is the result of the study on how CF7 API, WP APIs and BWP Captcha plugin works, in order to code the necessary hooks to add recaptcha to CF7, including a settings page to configure the theme and language you want to use.
<h4>Requirements</h4>
<ul>
<li>You need the <a href="https://wordpress.org/extend/plugins/contact-form-7/" title="Contact Form 7 Plugin" rel="ugc">Contact Form 7</a> plugin to be installed and activated.</li>
<li>You need the <a href="https://wordpress.org/extend/plugins/bwp-recaptcha/" title="Better WordPress reCAPTCHA Plugin" rel="ugc">BWP reCAPTCHA</a> plugin to be installed and activated.</li>
</ul>
<h4>Settings</h4>
The settings of the BWP reCAPTCHA plugin are used by default. You can change that behaviour on the settings page of the plugin under:
BWP reCAPT -> CF7 Options
<h4>Feedback</h4>
If you like the plugin please rate it. If you don’t like it, please contact us so we can address the problem or feature request.
Please if you find the plugin is not working for you and you report it, fill the form with what exactly do you think is not working. Thanks.
This plugin is provided as is by manfer (http://manfersite.tk).

Contact Form 7 BWP reCAPTCHA Extension

This plugin provides a new tag for the Contact Form 7 Plugin. It allows the usage of a reCAPTCHA field provided by the BWP reCAPTCHA Plugin.

Silkalns

WP Chill

Cristian Raiber

A very useful plugin for everyone using WordPress. Adds reCaptcha security to the WordPress login form, register form and comment form. This plugin could help your blog get rid of a lot of spam comments or brute-force attacks.
Nothing gets passed it if the reCaptcha doesn’t validate.
A few notes about the plugin:
<ul>
<li>Supports audio or image captcha types</li>
<li>Can generate the reCaptcha image / audio type in a number of predefined languages</li>
<li>Adds reCaptcha protection to the WordPress login form</li>
<li>Adds reCaptcha protection to the WordPress register form</li>
<li>Adds reCaptcha protection to the WordPress comment form</li>
<li>Adds reCaptcha protection to the WordPress recover password form</li>
</ul>

Uber reCaptcha

This plugin adds the reCaptcha form to the WordPress login form, recover password form, register form and comment form.

Contact Form 7 BWP reCAPTCHA Extension vs Uber reCaptcha