Cool! If I get a chance, I will take a look and see how easy it would be to plug this as a storage/analytics option into the Snowplow Kinesis flow (https://github.com/snowplow/snowplow/tree/master/3-enrich/sc...).

This is good example of how to answer 'big data' questions without big expensive distributed systems via the magic of lots of RAM and probabilistic data structures.

great point and this is the exact rationale behind the architectural design

if you are interested, there is also a separate blog post, http://www.codecademy.com/blog/143-eventhub-open-sourced-fun..., in which we talk about some high level architecture consideration

Thank you for sharing! Would be great to see course material on codecademy that walks people through the EventHub API.

Are you using this in Production now? I took a stab at something similar in Ruby (https://github.com/doomspork/Orwell) awhile ago, seeing this makes me want to dust it off and add new features. Thanks for sharing!

This looks fantastic, kudos for open sourcing

The UI looks to be heavily inspired by Mixpanel's

One of the first things I noticed when I checked it out. Both MixPanel and Codecademy are YC so I wonder whether there was any communication around it.

can't see d3 for the funnel/cohort charts .. then what are you using for drawing the charts?