Ackee and Fathom are very similar. Both in the way they display data and how they process it. The biggest advantages of Ackee (compared to Fathom) are probably:

- A documented REST API that lets you build upon Ackee. Could be used for custom import scripts or apps that display your current visitor stats in the menu bar. - Ackee allows you to track more than just page/site views (browser, system, etc.). This is optional and off by default, but great for people/companies that need more insights.

Fathom definitely has a head start, while Ackee is very young. Can't wait to see how Fathom v2 will look like and how both will compare in the future.