[pletsch]

I use Matomo, it runs on my home server, its open-source. Pretty sure you could run it on a Pi. There's a docker container that you can spin up in a few minutes.

https://matomo.org/

[asidiali]

Seconded - set up on a project instance last weekend in about 5 minutes, and it has been chugging along swimmingly since! And they’ve been doing it for a long time, Piwik was great even before the rebrand.

[ehnto]

+1, you own the experience and the data that way. Even if you don't use PHP in your projects, almost everywhere has PHP so it's not hard to host it.