[shafyy]

If you track Personally Identifable Information, such as IP addresses or emails, yes. If you track completely anonymously, then no. Of course, this limits what kind of anylses you can do (e.g. cohort-based analyses will be impossible). But I would also wager that you don't really need that, especially if you're a small startup. You can have a look at my open-source, self-hostable Mixpanel alternative if you are interested: https://github.com/shafy/fugu