Ah, thank you for pointing out the author. Helps with the inferiority complex for my past attempts at data visualization dashboards. It does say in the footer:

Ah, thank you for pointing out the author. Helps with the inferiority complex for my past attempts at data visualization dashboards. It does say in the footer: "Data analysis by Kevin Systrom and site built by Mike Krieger, with thanks to Ryan O’Rourke and Robby Stein." I particularly liked browsing the code for the hero chart, which you can find under static/js/StackViz.js. 630 lines of JS and you can see the level of attention to detail. I couldn't find a copyright or licensing statement, but there are a few pieces of StackOverflow code copied and pasted into the bundle, so in theory the whole code base is therefore open source.