The Chatbase service, which was recently shut down, provided analytics for Dialogflow bots.
However, it was missing an important feature: you had no way to ensure that the intent mapping was accurate. As a result, everything that was built on top of that assumption was not entirely useful.
Here is a much better alternative: Airtable
Here are the reasons why I recommend it
You can convert your Dialogflow ES agent ZIP file to a CSV format and upload it to Airtable to maintain the version of your chatbot.
I recommend ALSO uploading the ZIP file to source control. But this system is easier to visualize at-a-glance.
You can see an example of this below for a bot I deployed on this site