clicksend

This integration lets you set up automatic SMS alerts for form submissions, so you never miss an important interaction. You can message your customers as soon as they complete a form. Plus, you can tailor the SMS message to your business needs.
Features 
<ul>
<li>Use ClickSend’s global SMS delivery to reach your audience anywhere.</li>
<li>Edit messages to create notifications that work for your business. </li>
<li>Enjoy a straightforward setup with no technical barriers.</li>
<li>Ideal for businesses in various sectors, including real estate, e-commerce, and service-based industries.</li>
<li>Pay as you go SMS pricing. </li>
<li>Messages sent via trusted SMS gateway ClickSend.</li>
</ul>

SMS for Lead Capture Forms

This is a great plugin that allows us to capture leads on our website and feed them into the ClickSend.com system.

Does the job perfectly

This integration lets you set up automatic SMS alerts for form submissions, so you never miss an important interaction. You can message your customers …

nsozden

The plugin primarily allows a WordPress developer to extend functionality and integrate it into any type of site.
The plugin also includes functionality to directly send a text message to any number from the plugin settings page. 
You can use it to SMS any of your users or just for testing purposes
Here’s a list of what the plugin provides out of the box:
<ul>
<li>Custom function to easily send SMS messages to any number (including international ones)</li>
<li>Functionality to directly send a text message to any number from the plugin settings page</li>
<li>Hooks to add additional tabs on the plugin settings page to allow managing all SMS related settings from the same page</li>
<li>Basic logging capability to keep track of up to 100 entries</li>
<li>Mobile Phone User Field added to each profile (optional)</li>
<li>Shorten URLs using Google URL Shortener API (optional)</li>
</ul>
Extend, Contribute, Integrate
Visit the <a href="@todo" rel="nofollow ugc">plugin page</a> for full integration details. Contributors are welcome to send pull requests via <a href="@todo" rel="nofollow ugc">GitHub repository</a>.

WP Iletimerkezi SMS

WP Iletimerkezi SMS is a simple plugin to add SMS capability to your website.

SMS for Lead Capture Forms vs WP Iletimerkezi SMS