GoatCounter seems really promising, I especially like the simple web interface, the selected programming language (Go) and that it should work with a simple SQLite database.
Keep up the great work!
If you need some ideas for features that are currently implemented into KISSS but not into GoatCounter (AFAIK):
- Request stats from multiple domains (e.g. see the number of page views for all domains combined)
- Request stats by different criteria (e.g. only show stats with referrer of Hacker News or Browser Firefox)
- Reports: Daily email or Telegram message with stats
- Telegram bot: Request stats via Telegram
There's definitely a need of privacy-respecting analytics services that don't collect personal data. I hope you can succeed with your project!