We considered building on Mixpanel (and still are open to it) — we were 100% certain that Keen IO had the API we needed, and we liked that their business model

We considered building on Mixpanel (and still are open to it) — we were 100% certain that Keen IO had the API we needed, and we liked that their business model was in line with what we're doing. Also, I was worried that since Mixpanel is somewhat of a competitor, it wouldn't be wise to use them as a foundation.