Another very simple alternative is goaccess [0] which is purely server-side. It gathers quite a lot of information by parsing the server log. It doesn't do all the JavaScript stuff to track every single click, but it gives you stats on how many users visit your site, which parts, when, which sites or which domains they're coming from and also how much bandwidth they use. It also shows which status codes are coming from which paths and a lot more. It supports various output formats such as HTML or an interactive htop-like terminal application. It's also being actively developed. I use it and find it very useful.

0: https://www.goaccess.io/