I saw it mentioned while doing searches a while back and ended up on Quora where a Kilometer rep says in his post:

> our users often call us "Mixpanel on steroids" [1]

I then click through to find ironically, that Kilometer themselves use Mixpanel..

[1]: Screenshot: http://thumbsnap.com/i/kFfmeZEx.png?0310 (from https://www.quora.com/What-are-the-best-Mixpanel-alternative...)