We use Fathom on all our Fission websites, since it aligns with our principles of user-controlled data. That link is a referral link, and you’ll also get a $10 credit.
Using Fathom Analytics with Discourse Forum
It took me a while to figure out how to set this up correctly, since Discourse is an SPA. See the Coywolf forum for the details:
Don’t forget to add the Fathom CDN to the Discourse admin content security policy script src.