https://github.com/twitter/ "100 public repos"

https://github.com/facebook "95 public repos"

https://github.com/37signals "44 public repos"

https://github.com/linkedin "49 public repos"

https://github.com/soundcloud "131 public repos"

These aren't "Open-Source companies". They contribute greatly to open source projects. But aren't themselves "Open-Source".

You can use MapBox's open source software to do everything you'd pay MapBox for on your own. You'll just have your work cut out to autoscale and make it georedundant at high volume, which is MapBox's value add. MapBox isn't selling the software IP, the user, ads, or lock-in.

Simply posting a github link and "156 public repos" doesn't really imply this, though. So thank you for clarifying.

If 37signals were to release basecamp, this would be a better comparison. At that point, I would probably call 37signals an opensource company, even if they ran a SASS model.