CrestaProject

<a href="https://crestaproject.com/cresta-help-chat-demo-page/" rel="nofollow ugc">Plugin Demo</a> | <a href="https://crestaproject.com/downloads/cresta-help-chat/" rel="nofollow ugc">Plugin Homepage</a>
With Cresta Help Chat you can allow your users or customers to contact you via WhatsApp simply by clicking on a button. Users may contact you directly in private messages on your WhatsApp number and continue the conversation on WhatsApp web or WhatsApp application (from mobile). 
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-help-chat text=”Need Help?” icon=”yes” position=”top”] shortcode. 
Cresta WhatsApp Chat is compatible with WooCommerce and WPML.
Some features
<ul>
<li>Add the button to open WhatsApp Chat at bottom right of your site</li>
<li>Use the shortcode [cresta-help-chat] to add the WhatsApp button in your posts, pages or custom post type</li>
<li>Choose which pages to show the WhatsApp Chat button</li>
<li>Mobile version: click the button and automatically open the WhatsApp 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>WhatsApp widget</li>
<li>Different Animations</li>
<li>and much more…</li>
</ul>

Cresta Help Chat

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

CodeBard

Provide professional support to users in your own language with CodeBard Help Desk. 
<a href="http://help-desk-demo.codebard.com" rel="nofollow ugc">Check out the Live Demo here</a>
Its professional features include:
<ul>
<li>Unlimited Users</li>
<li>Unlimited Agents</li>
<li>Unlimited Tickets</li>
<li>Unlimited Departments</li>
<li>Multi Language</li>
<li>Easy Language translation from WP admin</li>
<li>English, Spanish (Intl.), Indian (Hindu) languages included</li>
<li>Front End Tickets</li>
<li>Front End Interface for Users</li>
<li>Front End Interface for Support Admins and Agents</li>
<li>Easy to Use</li>
<li>Private Tickets</li>
<li>Email Notifications</li>
<li>Ticket and Reply Attachments</li>
<li>Support Admins, Support Agents with separate permissions</li>
<li>Easy ticket management</li>
<li>Responsive</li>
<li>Extensible</li>
<li>Compatible with all Themes and Plugins</li>
<li>Adapts to visuals of any Theme</li>
<li>Hooks and Filters</li>
</ul>
In the <a href="http://help-desk-demo.codebard.com/" rel="nofollow ugc">Live Demo</a>, try changing the theme from Theme Switcher widget on the right column to see how CodeBard Help Desk adapts to different themes!
Use Language admin to easily translate your plugin into your own language or change your own language’s translation. New language packs will be upcoming! If you would like to contribute a translation for your own language, <a href="https://codebard.com/cb_p3_en-US.zip" rel="nofollow ugc">download this sample language file</a> to translate and then contact us from our <a href="https://codebard.com/contact" rel="nofollow ugc">contact page</a> to get credited.
Quickstart Guide is <a href="https://codebard.com/codebard-help-desk-for-wordpress-quickstart-guide" rel="nofollow ugc">here</a> and detailed manual is <a href="https://codebard.com/codebard-help-desk-for-wordpress-manual" rel="nofollow ugc">here</a>. All settings in your Plugin admin has detailed and easy to understand descriptions.

Free support is available through Plugin forum, and Premium support is available through <a href="https://codebard.com/support" rel="nofollow ugc">CodeBard site</a>.
If you have a WooCommerce store, get the <a href="https://codebard.com/codebard-help-desk-woocommerce-integration" rel="nofollow ugc">WooCommerce Integration Addon</a> to power up your Help Desk and provide professional support to your store’s customers easily:
Remember to follow us on Twitter (@codebardcom) or join our Newsletter by your Quickstart Wizard to hear about new features, announcements and goodies!

CodeBard Help Desk

This plugin was developed for in-house use, then matured to a plugin for release to public. We are using this in a few sites to render support to our users. Its easy to use and extensible. Multiple languages proved to be a great addition. 

Evolved to a great plugin

Multi Language Professional Support Ticket System with Unlimited Users, Unlimited Tickets, Unlimited Departments, Agents and many features

Cresta Help Chat vs CodeBard Help Desk