Possibly Amazon. They tend to leave acquired companies alone to manage how they prefer, apart from Bezos micromanaging how to cut costs and restructure logistics, which is often a good thing. Plus Amazon (like Microsoft or Google) also has economy of scale opportunities for hosting GitHub on AWS.

I do believe Amazon would interfere less with what users like about GitHub than Microsoft would.

Amazon?

They seem to handle acquisitions well. Zappos, Audible, Twitch...

Apple. I know it's not Apple's style but imagine if Apple started expanding outside of it's bubble like Microsoft has. If they really went all in it would be amazing.

I use mostly Apple products, for 25 years, but I would not want Apple to own GitHub.

Microsoft has always been a developer-tools company. They are many other things besides, and I have had some nasty experiences with their sales reps (who would say anything to close a deal), but I have always felt that at its core, Microsoft is a developer-driven organization.

Apple likes developers too. They taste like chicken. And a cloud-based developer institution would let Apple destroy two populations - cloud operations and developers - with one asteroid.

Apple would charge $100/yr and require Safari for access to Github. Updates will come once per year.

I would prefer if Apple would continue to focus on making my phone better. They really slipped up with their QA on recent iOS releases.

Yea but I don't think it's continued focus that will help here. Apple has continued it's modus operandi and quality has decreased like you mentioned. Granted, acquiring GitHub is most likely not the right fix, but I think something about Apple's particular way of operating is holding it back.

Apple has enough money that they could easily make your phone better and develop github and do eight other things.

IPO.