Github does seem to be the gold standard for open source projects. Having said that, I used to pay for Github's personal plan and found the cap on private repo

Github does seem to be the gold standard for open source projects. Having said that, I used to pay for Github's personal plan and found the cap on private repos (5 when I subscribed) to be a little too limiting. I ended up canceling the subscription and using a Bitbucket free account for private repos and Github for public repos. After using Bitbucket for a while, I think if I had to upgrade to a paid service, I'd just stick to Bitbucket.