I used a self-hosted Piwik (Matomo) instance for analytics at my previous job for a few years. It worked fine for my basic needs and has a great API that I used

I used a self-hosted Piwik (Matomo) instance for analytics at my previous job for a few years. It worked fine for my basic needs and has a great API that I used for custom reports, but I wasn’t doing anything terribly complex. I recommend it, especially if you have full control of the decision and time to learn a bit about it.