Xoxzo Inc.

This plugin triggers sms and voice call using xoxzo telephony service. 
Some triggers are based on woocommmerce email events.
The following are events that trigger sms/voice notification:
<ol>
<li>New order
<ul>
<li>Pending to processing/completed/on-hold </li>
<li>Failed to processing/completed/on-hold </li>
</ul>
</li>
<li>Cancelled order
<ul>
<li>Processing to cancelled</li>
<li>On-hold to cancelled</li>
</ul>
</li>
<li>Failed order
<ul>
<li>On-hold to failed</li>
<li>Pending to failed</li>
</ul>
</li>
<li>Order on-hold
<ul>
<li>Pending to on-hold</li>
<li>Failed to on-hold</li>
</ul>
</li>
<li>Processing order
<ul>
<li>Failed to processing</li>
<li>On-hold to processing</li>
<li>Pending to processing</li>
</ul>
</li>
<li>Completed order</li>
<li>Fully refunded order</li>
<li>Partially refunded order</li>
<li>Low stock</li>
<li>No stock</li>
<li>Order details(Resending order information)</li>
<li>Customer note</li>
<li>Reset password</li>
<li>New account</li>
</ol>

Xoxzo – SMS and voice notification plugin for WooCommerce

This plugin triggers sms and voice call using xoxzo telephony service.

DialBunny

Copuloo – Phone System

Copuloo is a plugin that lets you make and receive calls and text messages through your Twilio account directly from your WordPress dashboard.

Xoxzo – SMS and voice notification plugin for WooCommerce vs Copuloo – Phone System