There are a lot of old threads (on HN[1] or Quora[2]) that ask this - but none of them seem to reflect latest on who's using Clojure in production in late 2014. The recent State of Clojure data [3] doesn't capture this either.

[1] https://hn.algolia.com/#!/story/forever/0/whos%20using%20clojure

[2] https://www.quora.com/Whos-using-Clojure-in-production

[3] https://cognitect.wufoo.com/reports/state-of-clojure-2014-results/