Bitbucket is a web-based hosting service for projects that use either the Mercurial or Git revision control systems. Bitbucket offers both commercial plans and free accounts. It offers free accounts with an unlimited number of private repositories (which can have up to five users in the case of free accounts) as of September 2010, but by inviting three users to join Bitbucket, three more users can be added, for eight users in total. Private repositories are not shown on profile pages - if a user has only private repositories, it will simply state that the user does not have any repositories until the user creates a public repository. Bitbucket is written in Python using the Django web framework.
It is similar to GitHub, which primarily uses Git. In a 2008 blog post, Bruce Eckel compared Bitbucket favorably to Launchpad, which uses Bazaar.
