At Peloton, we are massive fans of Amplitude. As a subscription-based business, we are constantly looking at behaviors tied to high engagment and retention. The enterprise solution unlocks the ability to create behavioral cohorts based on any action taken in the app or any trait of the user, which is incredibly powerful. Also the team is constantly improving the product. Couldn't recommend these guys enough.
*We use Amplitude via Segment rather than the direct integration.