I also use Bitbucket and am very pleased with it. It seems like their model is that bitbucket is well integrated and complements their paid products like JIRA a

I also use Bitbucket and am very pleased with it. It seems like their model is that bitbucket is well integrated and complements their paid products like JIRA and Teamcity, so they are not depending on free users to upgrade like github needs to, so it seems more likely to be sustainable.