CrestaProject

<a href="https://crestaproject.com/cresta-facebook-messenger-demo-page/" rel="nofollow ugc">Plugin Demo</a> | <a href="https://crestaproject.com/downloads/cresta-facebook-messenger/" rel="nofollow ugc">Plugin Homepage</a>
With Cresta Social Messenger you can allow your users or customers to contact you via Facebook Messenger simply by clicking on a button. Users may contact you directly in private messages on your Facebook page and continue the conversation on Facebook Messenger. 
You can use the floating button which is positioned at the bottom right of the site or a button inside post or pages using the [cresta-facebook-messenger text=”Need Help?” icon=”yes” position=”top”] shortcode. 
Cresta Social Messenger is compatible with WooCommerce and WPML.
Some features
<ul>
<li>Add the button to open Facebook Messenger at bottom right of your site</li>
<li>Use the shortcode [cresta-facebook-messenger] to add the Facebook Messenger button in your posts or pages</li>
<li>Choose which pages to showo the Facebook Messenger button</li>
<li>Mobile version: click the button and automatically open Facebook Messenger App (if installed)</li>
<li>and more…</li>
</ul>
PRO version features
<ul>
<li>Change position of the box button</li>
<li>Change colors of the box button</li>
<li>Add tooltip on the box button</li>
<li>Change box size</li>
<li>Facebook Messenger widget</li>
<li>Different Animations</li>
<li>and much more…</li>
</ul>

Cresta Social Messenger

Allow your users and customers to contact you via Facebook Messenger with a single click.

Najmul

Facebook Messenger Live Chat is a wordpress plugin which will bring facebook messenger to your website. 
Visitors of your website can communicate with you directly through facebook messenger without going anywhere.
SUPPORT TEAM
We’ve a dedicated team of coders and wordpress experts to make your journey to us friendlier & error free. So, if you want to use our plugin or if you are facing any problem with our plugin feel free to say us by emailing here: contact.leaddevs@gmail.com.
AVAILABLE FEATURES:
<ul>
<li>Super simple to set up(installation)</li>
<li>WordPress & Woo commerce compatible</li>
<li>Completely responsive and mobile ready – Chat icon looks great on any screen size and in any container width</li>
<li>Completely customizable – Page selecting option which page can you connect with your messenger, Color changing option, Enable/disable facility, Messenger Icon position(right,left corner) and many more.</li>
<li>Multilingual – Localization(Language change option)</li>
</ul>

Cresta Social Messenger vs Leaddevs Messenger Live Chatbot