Right now I'm using Elixir to build an open-source nonprofit tech company, I will have to remember to add it to this project directory once we launch. Cool idea, keep up the good work. As a nonprofit tech company keeping costs low matters a lot, and Erlang/Elixir on BEAM makes it very easy to have tons of concurrent users with minimal overhead. Server start time is very fast. Coming from other functional languages like Clojure helps, but is not a requirement for getting started quickly.