Mixpanel is event driven from our system. It is a good tool but we do not use it to the full extent. The Live report is really good. Mixpanel is very powerful, but you have to really educate yourself about what the tool can do.
We use Google Analytics for our marketing website. It’s okay for what we need it. I would like to use it for our web app but it is too complicated. With a single page application, it is hard to get good analytics on how the user navigates the site. There is a gap between the marketing campaign and how the user uses our tool. There should be some tool that is a bridge between the two.
MailChimp is a great tool for marketing, but it does not do transactional emails. The visual editor is very good and that allows the marketing people to build the campaigns themselves.
SendGrid is good for transactional emails--we only use the API, not the interface. It works nicely; we do not get any bounce emails--all the emails get delivered. Also, it is very cheap.
We use Box. I do not like Google Drive because I think that it is better to work on a directory structure. Box is similar to Dropbox but it’s more mature and has better security features. It is a better enterprise solution.
Slack is like cocaine--it is so addictive. Every communication ends up getting into Slack even if it does not belong. I end up using emails for more technical conversation, and to maintain a thread.