Autotrack vs Fathom Analytics: What are the differences?

Autotrack: Open source lib for automatic and enhanced Google Analytics tracking for common user interactions on the web (by Google). It provides default tracking for the interactions most people care about, and it provides several convenience features (e.g. declarative event tracking) to make it easier than ever to understand how people are interacting with your site; Fathom Analytics: Simple, open source website analytics library. Fathom tracks users on a website (without collecting personal data) and give you a non-nerdy breakdown of your top content and top referrers. It does so with user-centric rights and privacy, and without selling, sharing or giving away the data you collect. It's a simple and easy to use for website owners at any technical level.

Autotrack and Fathom Analytics can be primarily classified as "General Analytics" tools.

Autotrack and Fathom Analytics are both open source tools. It seems that Fathom Analytics with 5.63K GitHub stars and 228 forks on GitHub has more adoption than Autotrack with 4.47K GitHub stars and 482 GitHub forks.