Earlier quoted context omitted.
I keep my eye on Microsoft's Visual Studio Team Services. It has a bit of a clunky name and aimed more at enterprises but I think at some point they will position it as a competitor to GitHub. It's free for the first five developers, and no charge for "stakeholder" user accounts. https://www.visualstudio.com/pricing/visual-studio-team-serv... So 29 users would be $182/m (check my maths) and you'd pay nothing for the…
If you no longer want/need the social aspects of GitHub, you can just move to GitLab. Much more affordable and you can self host it yourself. We have an on premise GitLab installation. Besides the rare upgrade, it's pretty hands off. And it's costing us $0 in licensing fees for over 60 users ;-)
[1] https://www.visualstudio.com/get-started/overview-of-get-sta...
Hard to argue with free though, if that's what you're looking for.