useStrict

Easily embed Calendly widgets onto your pages, with the ability to prefill the fields from the database or query strings. Prefilling is 
done via Javascript and Ajax, so it is caching-safe.
Use the configurator in the settings to generate the shortcode with all supported parameters.
Check out the <a href="https://usestrict.net/calendly-embedder-pro/?utm_source=readme&utm_medium=plugin&utm_campaign=promotion" title="UseStrict's Calendly Embedder Pro" rel="nofollow ugc">Pro version</a> for the following:
<ul>
<li>Save your shortcodes in a library for ease of use;</li>
<li>Embed using a Gutenberg block;</li>
<li>Embed using an Elementor widget;</li>
<li>Setting Google Analytics variables (Campaign, Source, Medium, Content and Term)</li>
<li>Tracking interaction such as
<ul>
<li>Profile page was viewed</li>
<li>Event type page was viewed</li>
<li>Invitee selected date and time</li>
<li>Invitee successfully booked a meeting</li>
</ul>
</li>
</ul>

UseStrict's Calendly Embedder

I wanted to install Calendly on my podcast site for approved guests to be able to book a time. I didn't want them to have to click a link to open a tab into my calendar. After trying a few different methods, I discovered this plugin. It was intuitive, the documentation was spot on, and in less than 3 minutes my calendar was displayed on my site.

Simple to Use and Works Perfectly

Simple but powerful embedding for Calendly.

justdave

Upcoming Events Registration List for Calendly
This WordPress plugin adds a shortcode to list upcoming scheduled events from Calendly using the Calendly API and offers registration links for already-scheduled group events that still have open slots. You can either list all of your scheduled events, or restrict it to a specific event type.
To set it up, you will need to log into Calendly and generate an Access Token. A link to do so is provided on the settings page. Paste the token into the box on the settings page.
To use it, place the shortcode <code>[upcoming-for-calendly]</code> on a post or page where you want the list to appear. To restrict it to a specific event type, use <code>[upcoming-for-calendly event="Event Type Name"]</code>.
The plugin currently implements a feature I needed. I am open to adding additional features that can be implemented via Calendly’s API if there is a need for them.
Bug reports and feature requests can be filed at the <a href="https://github.com/justdave/upcoming-for-calendly/issues" rel="nofollow ugc">GitHub repository</a>.

Upcoming for Calendly

Display a list of upcoming already-scheduled Calendly events that still have open slots, and link to their specific registration pages.

UseStrict's Calendly Embedder vs Upcoming for Calendly