fathom - Looks great. I am OK with closed source products (my motivation is self-hosting/privacy) but the direction is not clear to me. Maybe they will have a blog about it at some point - https://github.com/usefathom/fathom/issues/268. Having multiple code bases is going to be super hard.
goaccess.io - this analyses web logs
google-analytics-proxy - project is dead
matomo - this is what i use now and it works great. has a lot of quirks but if you spend some time, you can make it work.
ackee, goatcounter - simple but looks like this does not track users/sessions. it's mostly for page hits.
countly - looks good if you are enterprise. there is no pricing :(
freshlytics (from another thread) - page says it's in beta and not production ready
As for Fathom, I find that last "since that people are confused"-comment rather funny, since their messaging on this has been confused for almost a year, haha
- Goatcounter also came up a few days ago on HN and got a lot of traction/discussion[1]
I can't find the comment it was posted in, but a HN user did a good comparison of a few privacy-focused analytics tools[2]
[0] https://simpleanalytics.com/
[1] https://news.ycombinator.com/item?id=22044854
[2] https://dev.to/hmhrex/a-comparison-of-the-top-3-privacy-focu...
Edit: I found the OG comment for the blog post: https://news.ycombinator.com/item?id=21716544