You're missing a pretty important category tools used to communicate automatically with users. Mixpanel and KISS have some features like this, but there's others more focused on it. Customer.io, Intercom.io, etc.
https://github.com/jasonbosco/user-bee
Would love to hear feedback.
Ultimately, this wasn't meant to be an exhaustive list. It's just a quick list from some very superficial collecting of URLs. There's still a lot of work to do for the book before the list is complete.