Use Cases and Deployment Scope
We use Hotjar at our organization to better understand user behavior on our website and we've also used it within our application too. It's great that we can see what the user see and what they are doing and where they are going so we can improve the usability/user journeys. If your looking to make your user's life easier/increase engagement then Hotjar is definitely a tool you should consider.
Other Software Used
Zendesk Support Suite, Datadog, Perimeter 81, Amazon Web Services, PhpStorm, Laravel PHP Framework, Slack, MobileIron Acquired by Ivanti, SentinelOne Vigilance, Zoom, GoToAssist, Lucidchart, HelloSign, Dropbox