Andy Brudtkuhl

Integrate the Zendesk Web Widget into the WordPress admin to allow your users to submit help desk tickets and ask questions from inside the admin.
The widget pre-populates the logged in user\’s information with Name, Email Address, and Username. When they fill out the form it creates a help desk ticket in Zendesk passing in their information, their message, and what page they were on when they submitted the request.
This plugin is great if you are managing multiple client WordPress sites or large bases of WordPress users and want to track requests and issues with the excellent Zendesk helpdesk system.
It\’s very easy to install, customize, and work with.

Admin Zendesk Help Widget

Integrates the Zendesk Web Widget into the WordPress Admin.

Jerry Benton

TokenLink SSO Login for Zendesk allows WordPress site administrators to provide seamless, secure single sign-on (SSO) access to Zendesk using JWT (JSON Web Tokens) authentication.
This plugin uses the official Firebase PHP-JWT library (BSD 3-Clause licensed, included and updated for WordPress compliance).
Setup takes less than five minutes using standard WordPress shortcodes — no third-party dependencies, no tracking, no bloat.
Written by Jerry Benton, the creator of Mailborder and MailScanner v5.
<h3>License</h3>
This plugin is licensed under the GPLv3 or later. 
It includes the Firebase PHP-JWT library, which is licensed under the BSD 3-Clause license.

TokenLink SSO Login for Zendesk

Provides secure JWT-based single sign-on (SSO) between WordPress and Zendesk. No third-party plugins, no tracking, no bloat. Totally free.

Admin Zendesk Help Widget vs TokenLink SSO Login for Zendesk