The software was written by Dmitriy Zaporozhets from Ukraine; the CEO, Sytse Sijbrandij, is based in Utrecht. The code is written in Ruby. As of May 2016, the company has 100 salaried employees[3] and more than 1300 open source contributors.[4] It is used by more than 100,000 organizations including Jülich Research Center, NASA, Alibaba, Invincea, O’Reilly Media, Leibniz-Rechenzentrum (LRZ) and CERN.[5][6][7][8]