Chigozie Orunta

The Notify Slack Bot plugin is a simple notification plugin built to help alert WordPress site owners when posts have been created or published. It sends a simple notification message to the specified slack channel the user requires it to.
At a glance, this plugin helps you:
<ul>
<li>Configure your messages to be sent to slack.</li>
<li>Configure which slack channel to receive your messages.</li>
<li>Configure the logo to be used by your slack bot.</li>
</ul>

Notify Slack Bot

Notify your Slack channel when posts have been created or published on your WordPress site.

braveryk7

Send Chat Tools is a plugin that allows you to send WordPress announcements to chat tools. 
Currently, it sends an announcement when a comment is received. 
You can instantly check comments that you didn’t notice with the default email notification.

Send Chat Tools

Send Chat Tools is a plugin that allows you to send WordPress announcements to chat tools.

Notify Slack Bot vs Send Chat Tools