Maybe you look at the false examples :) http://www.cisco.com/c/en/us/about/corporate-strategy-office/acquisitions/ironport.html http://www.cisco.com/c/en/us/ab

Maybe you look at the false examples :) http://www.cisco.com/c/en/us/about/corporate-strategy-office/acquisitions/ironport.html http://www.cisco.com/c/en/us/about/corporate-strategy-office... = Cisco Web & Email Security The Source for the Server is now open source: https://github.com/ironport/shrapnel https://github.com/ironport/shrapnel (python / cython /Pyrex) And disqus had run mainly on Python before they moved some parts to Go-Lang https://github.com/disqus https://github.com/disqus Many Gov's / Edu's run on Plone