As stated by others already, there's Plausible (plausible.io) and Matomo (matomo.org).

I have used both and stuck at Plausible. A few reasons (subjective):

1. Plausible is GDPR compliant by default, it has an effective way to measure analytics throughout the day without cookies

2. It is simple and that's key. I don't need to know much, Plausible just gives me that

3. It's fairly lightweight. Matomo is quite heavy and as my VPS'es are pretty much scaled down, less is just more

4. The Plausible self-hosting doc is centered around Docker, which is the architecture I use myself and is set up in literally a few minutes