It's fair to say that most of us are running Google Analytics on at least a few of the sites we deal with. Market share for Google's traffic tracking platform was estimated last year around 75-80% in a few separate studies - here's one from Ghostery . Let's not get into the whole "Google knows too much" thing. The truth is, the platform is a pretty solid and user-friendly. (Even if it is the lure of an evil empire.