I'm the CTO of a startup in London.<p>If I went with this it would be the most expensive software I've bought. We currently use tools such as Trac, git, svn, Eclipse, Hudson, ... all are free and work well. Non-free tools tend to be editors that certain people want to buy and one copy of the full Adobe suite (which is pricey, but I only need one copy).<p>On the desktop and servers we use Mac OS X (which is pretty cheap).<p>$600/user/year is a lot of money for something that I'm essentially getting for free with Trac and git integration. As nice as GitHub is that would mean spending $9,000 a year.<p>This compares badly with say FogBugz at $199 per user for an outright purchase. The only thing it compares with is Perforce which runs around $750/user/year, but... GitHub doesn't give you the source control bit, that's free with git.<p>At that price you are getting into compiler licensing territory where there's serious value demonstrated. What value is GitHub demonstrating?