I want to have discussion site like SO for another purpose.

IS source of SO like sites https://meta.stackexchange.com/questions/4/list-of-stackexchange-sites free?

From where i can download, can i use on any site for any purpose free.


3 Answers 3


No, StackExchange and StackOverflow are not open-source software. However, you can pay a fee to use the stackexchange software on your own site1.

Alternatively, google for "open-source stackoverflow clone", which should give you a free alternative.

1 Apparently, stackexchange offers the first 45 days free as a trial

  • I need php/mysql based clone of like SO
    – Jitendra
    Feb 26, 2010 at 0:07
  • 4
    Get to work creating it then :)
    – Earlz
    Feb 26, 2010 at 0:10
  • I think SO is based on .net framework
    – Jitendra
    Feb 26, 2010 at 0:13
  • 1
    Yes, ASP.Net MVC I believe is what Joel said it was made with in some blog entry
    – Earlz
    Feb 26, 2010 at 0:27
  • @Jitendra the first google result I came up with is anantgarg.com/qwench, which is hosted on github for you at github.com/anantgarg/Qwench
    – a_m0d
    Feb 26, 2010 at 0:47
  • @a_m0d - Thanks for this link
    – Jitendra
    Feb 26, 2010 at 0:56

You should see the list of SO clones, some of which are open source, developed on the language the OP liked the most (Python, Ruby, PHP, ASP.Net).


You cannot download the source. Those sites are hosted by the Stack Exchange platform.

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