Bitbucket is the Git solution for professional teams. Collaborate on code in the cloud or on your servers.
GitHub is how people build software. With a community of more than 14 million people, developers can discover, use and contribute to over 25 million projects using a powerful, collaborative workflow. Whether using GitHub.com or your own instance of GitHub Enterprise, you can integrate GitHub with third party tools, from project management to continuous deployment, to build software in the way that works best for you.
GitLab is a company based on the GitLab open-source project, helping developers collaborate on code to build great things and ship on time. They are an active participant in their global community of customers and contributors, trying to serve their needs and lead by example. They have one vision: everyone can contribute to all digital content, and their mission is to change all creative work from read-only to read-write.