Intercom is very nice for detailed feedback. It is connected to our CRM. It is very good for sending email and measuring the uptime for users.
We use Mixpanel for data crunching. You can send emails through Mixpanel as well but we try to limit the communication to one platform.
Google Analytics is very standard--it works well for the big picture and marketing analytics but not so much for the product. It doesn’t go down to the details.
We use also Trello but it is not really scalable. When you have large projects, it becomes hard to manage.
I used to work with Asana but dapulse is so much better. You can assign groups and can configure the tasks yourself. The workflow is also really nice--you have different boards for each sector (marketing, software, etc). The boards can be public or private and can be broken into sections. It is very intuitive.