What is Bitbucket?
Bitbucket is a web-based hosting service for projects that use either the Mercurial (since the origin) or Git (since October 2011) 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), but by inviting three users to join Bitbucket, three more users can be added, for eight users in total. 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.