Is it me, or does the left side of their logo look similar to KissMetrics'?
That definitely looks similar.
You're not the first person to say so. :-) While we're good friends with the KISSMetrics folks today, I wasn't aware of them when I first designed our logo in 2009.
I was inspired most by the iStatPro logo[1] and the Mac System Preferences[2] app logo[2].