Facebook Pixel vs Fathom Analytics: What are the differences?
Developers describe Facebook Pixel as "A piece of code for your website that lets you measure, optimise and build audiences for your advertising campaigns". A code that you place on your website. It collects data that helps you track conversions from Facebook ads. On the other hand, Fathom Analytics is detailed as "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.
Facebook Pixel and Fathom Analytics can be primarily classified as "General Analytics" tools.
Fathom Analytics is an open source tool with 5.63K GitHub stars and 227 GitHub forks. Here's a link to Fathom Analytics's open source repository on GitHub.