Aman

UPDATE: Ninja Forms 3.0 has now inbuilt integration for Google reCAPTCHA. If you are runnning the latest version of Ninja Forms then you don’t have to install this plugin anymore for reCAPTCHA integration
Adds a Google reCAPTCHA field type to Ninja Forms form builder. 
Forms with a reCAPTCHA will validate the field before successful submission.
How to use it?
<ul>
<li>Upload the plugin to wp-content->plugins directory,</li>
<li>Activate it from wordpress dashboard,</li>
<li>Add the Site Key and Secret from Forms->ReCaptcha,</li>
<li>Edit Form and you will see Google ReCaptcha field under Template Fields</li>
</ul>
Checkout our other plugins 
* <a href="https://webholics.org/downloads/gravity-forms-sendy-addon/?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Gravity Forms Sendy Addon</a> 
 Add user to Sendy using Gravity Forms. 
* <a href="https://webholics.org/contact-form-7-views?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Views for Contact Form 7</a> 
 Display Contact Form 7 Submisions anywhere on your site in table or list view 
* <a href="https://formviewswp.com?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Views for WPForms</a> 
 Display WPForms Entries anywhere on your site in table or list view 
* <a href="https://nfviews.com?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Views for Ninja Forms</a> 
 Display Ninja Forms Submisions anywhere on your site in table or list view 
* <a href="https://ninjapopup.org/?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Popup Addon for Ninja Forms</a> 
 Display Ninja Forms in beautiful popups. 
* <a href="http://codecanyon.net/item/ninja-forms-paypal-standard-payment-gateway/10047955?ref=webholics" rel="nofollow ugc">Ninja Forms Paypal Standard</a> 
 Take payments using Paypal Standard in your Ninja Forms 
* <a href="https://webholics.org/downloads/nf-getresponse-addon/?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Ninja Forms GetResponse Addon</a> 
 Add user to GetResponse using Ninja Forms. 
* <a href="https://webholics.org/downloads/nf-icontact-addon/?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Ninja Forms iContact Addon</a> 
 Add user to iContact using Ninja Forms. 
* <a href="https://webholics.org/downloads/nf-sendy-addon/?utm_source=wordpress-plugin-repo&utm_medium=ninja-forms-recaptcha-repo&utm_campaign=ninja-forms-recaptcha" rel="nofollow ugc">Ninja Forms Sendy Addon</a> 
 Add user to Sendy using Ninja Forms.
<pre><code>Have Suggestion/Feedback
</code></pre>
Please send me your feedback <a href="https://webholics.org/contact/" rel="nofollow ugc">here</a> for any new features you want to see in next version of this plugin.I will be glad to receive feedback.

reCAPTCHA for Ninja Forms

wprecaptcha

WP reCAPTCHA protects your site from spam and abuse. It uses advanced risk analysis techniques to tell humans and bots apart.
WP recaptcha is the only WP Plugin curretly offering reCAPTCHA v3 for Gravity Forms.
WP recaptcha Supports all Google reCAPTCHA versions: 
* Version 3 
* Version 2 – checkbox 
* Version 2 – invisible
WP recaptcha is very simple to use! just select the page that contains the form – WP recaptcha will automatically generate the required recaptcha code.
<a href="https://demo.wprecaptcha.com/" rel="nofollow ugc">View Demo</a>
<h4>Free Features</h4>
<ul>
<li>Add Google reCAPTCHA to:
<ul>
<li>Login Form</li>
<li>Register Form</li>
<li>Lost Password Form</li>
<li>Reset Password Form</li>
<li>Comments Form</li>
</ul>
</li>
<li>Disable Google reCAPTCHA for registered users</li>
<li>Select Google reCAPTCHA language manually or Switch Languages Automatically.</li>
<li>Supports Google reCAPTCHA:
<ul>
<li>Version 3</li>
<li>Version 2 – checkbox</li>
<li>Version 2 – invisible</li>
</ul>
</li>
<li>Available Google reCAPTCHA extended settings for:
<ul>
<li>Version 3
<ul>
<li>Hide badge for Desktop devices</li>
<li>Hide badge for Mobile devices</li>
</ul>
</li>
<li>Version 2 – checkbox
<ul>
<li>Select theme
<ul>
<li>Light</li>
<li>Dark</li>
</ul>
</li>
<li>Select Size
<ul>
<li>Normal</li>
<li>Compact</li>
</ul>
</li>
</ul>
</li>
<li>Version 2 – invisible
<ul>
<li>Select Google badge position:
<ul>
<li>Bottom Right</li>
<li>Bottom Left</li>
<li>Inline</li>
</ul>
</li>
<li>Hide badge for Desktop devices</li>
<li>Hide badge for Mobile devices</li>
</ul>
</li>
</ul>
</li>
<li>Compatible with latest WordPress version</li>
<li>Configure all subsites on the network</li>
</ul>
<blockquote>
Pro Features
All features from Free version included plus: 
 * Compatible with: 
 * Gravity Forms 
 * Contact Form 7 
 * Jetpack Contact Form 
 * Contact Form by WPForms 
 * MailChimp for WordPress 
 * Compatible with Woocommerce: 
 * Login Form 
 * Register Form 
 * Lost Password Form 
 * Order Form 
 * IndividualSettings for each form use Shortcode Generator 
 * 24x7x365 support
</blockquote>
<a href="https://www.wprecaptcha.com/" rel="nofollow ugc">Upgrade to Pro</a>

WP reCaptcha

Add Google reCaptcha to WordPress forms. Easy to add, advanced security for your forms.

reCAPTCHA for Ninja Forms vs WP reCaptcha