Camilo

This plugin adds the <a href="https://sweetalert2.github.io" rel="nofollow ugc">SweetAlert2 script</a> into <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact Form 7</a> wordpress plugin submission process.
<blockquote>
This plugin requires the Contact Form 7 plugin to work.
</blockquote>
Just activate it to replace CF7 default submission output by a SweetAlert2 pop up. 
The add-on will display the Contact Form 7 messages in the pop up.
If you want, you can set a custom duration and a custom title for the alerts.
This plugin is an enhancement to the plugin created by akandor, Antoine Derrien which was closed by WordPress security team
Its base has been used and all this has been improved: 
-Load admin styles only on the settings page 
-Removed style sheets with little css content (It has been directly embedded, as it does not make sense load a sheet for a few lines) 
-Sanitize data input and output (Since it was vulnerable to XSS attacks) 
-Update css and js files from sweetalert (Since it was very outdated) 
-Show sweetalert icons again 
-Remove unnecessary code and files 
-Css fix, since there was conflict with some themes 
-Load the js and css only when the contact form shortcode is detected (Except a script) 
-Titles are now converted to uppercase by default
<h3>How does it work?</h3>
It enqueues scripts and styles to override CF7 submission process and surcharge it with SweetAlert2 scripts.

Add-on SweetAlert Contact Form 7

If you want an easy way to integrate SweetAlert2 to your CF7 forms, without having to write a lot of code yourself... this plugin is simple, clean, and works.  I also REALLY like how it only enqueues the scripts on CF7 pages.  Nicely done. 

Simple and Effective

Add SweetAlert2 script into Contact Form 7 submission process.

Azamat

Contact Form 7 is a staple for WordPress sites—but the default confirmation messages? Not so much.
Result Popups for CF7 replaces those inline alerts with beautiful, customizable SweetAlert modals. It just works out of the box—no settings required—but if you’re a power user, you’ll find plenty to tweak.
Why use Result Popups? 
– It looks amazing. 
– It improves form UX. 
– It makes your site feel more modern.
Use cases: 
– Alert users when their form was submitted successfully. 
– Show styled error or spam messages in a modal window. 
– Replace native CF7 alerts with a modern visual experience.
<h3>Features</h3>
<ul>
<li>✅ Works automatically—no configuration needed </li>
<li>🎨 Optional settings panel with popup behavior and style options </li>
<li>💬 Handles all CF7 statuses: success, validation errors, spam, and failures </li>
<li>🌐 Translation-ready and lightweight </li>
<li>🔄 Graceful fallback to native messages if plugin is deactivated </li>
<li>⚙️ Lightweight, flexible, and easy to set up</li>
<li>🔌 Works as a native Contact Form 7 extension — no complex setup required</li>
</ul>

Result Popups for CF7

Modernize your Contact Form 7 messages with clean, customizable SweetAlert2 popups. No config needed. Just activate and enjoy.

Add-on SweetAlert Contact Form 7 vs Result Popups for CF7