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.

Rhino Support

Rhino Support for WordPress allows you to bring your RhinoSupport.com help desk right into any site powered by WordPress.
Visitors can create new support tickets as well as view existing tickets (if logged in) – without even leaving your WordPress site.
Here’s a quick overview:
1) Various Support Options
Within your WordPress site you can have a variety of support options for your visitors based on your preferences including:
Floating Support Tab – This floating support tab can be positioned wherever you like, added to any post or page (or every one if you like) and customized with any colour or text.
Ticket Form on Post/Page – With a simple short code you can add a ticket form to any post or page so your visitors can easily submit a new support ticket from within your site.
2) Short Codes
The Rhino Support short codes make it quick and easy for you to add a new ticket form or even list open tickets for any logged in users on any post or page.
From the visual editor, the short codes are just one click away.
3) Create Different User Experiences
Sometimes you may have the need to display different support options for people who are logged into your site versus regular visitors.
Commonly this is used for “presales” questions vs. actual customer related questions.
This can easily be done by selecting what departments you want to display for logged in users and what departments you want to display for everyone else.
Furthermore, if a person is logged into your WordPress site, you can quickly list all the support tickets for a particular user by dropping the Rhino Support “list” short code on any post or page. If the user is logged in and they view that page, they’ll be able to see the status of all their existing tickets without even leaving your site.
Not a RhinoSupport.com customer? Get your own <a href="http://www.rhinosupport.com" rel="nofollow ugc">help desk software</a> account which includes unlimited agents and a generous 45-day free.
Twitter: <a href="http://twitter.com/rhinosupport" rel="nofollow ugc">@RhinoSupport</a>

Rhino Support for WordPress

Easily connect a WordPress site to your help desk, powered by RhinoSupport.com. Instantly embed support ticket forms with a simple shortcode.

Cresta Help Chat vs Rhino Support for WordPress