Unfortunately, I don't think I've seen this publicly reported and I'm not in a position to decide to make that public. I will say that the amount we pay for ou

Unfortunately, I don't think I've seen this publicly reported and I'm not in a position to decide to make that public. I will say that the amount we pay for our infrastructure, especially right now, is reduced by generous support from both Fastly and Google. It still remains a substantial expense after that support. One final note on cost: we are actively working on a Python to Go transition[1] that will reduce our hosting costs, among other benefits. [1]: http://engineering.khanacademy.org/posts/goliath.htm http://engineering.khanacademy.org/posts/goliath.htm