We have switched ESPs 3 times since our startup launched... it would have been great to have all the data on a service like mixpanel instead of starting over ea

We have switched ESPs 3 times since our startup launched... it would have been great to have all the data on a service like mixpanel instead of starting over each time. On top of that, we also use a mix of ESPs and our own mail servers from time to time, so mixpanel's service would help there as well to consolidate everything.