Bitbucket is one of the largest code hosting solutions out there. Supported by Atlassian and used by millions, it uses both Git and Mercurial.
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Pro Free unlimited private repositories for small teams
Bitbucket offers unlimited private repositories for free, as long as the number of members in a team is not larger than 5. In other words, it does not charge for each number of private repository, instead it charges by the number of team members.
Pro Native application for both Mac and Windows
Atlassian, the company behind BitBucket is also behind SourceTree, a free application for Windows and Mac wich works as a client for both Git and Mercurial and can be connected to BitBucket and/or other code hosting services.
Pro Integrated issue tracking system
BitBucket comes with an integrated issue/tickets management system.
Pro Multiple authentication methods
BitBucket supports Twitter, Facebook, OpenID, Google and even GitHub authentication.
Pro JIRA integration
JIRA, the widely used project and issue tracker is developed by Atlassian, the same team that's behind BitBucket.
When the two are integrated, JIRA automatically updates issues when a new commit is made in the BitBucket repo.
Pro Allows importing existing repositories
BitBucket has a feature which allows users to import an existing repository that has been hosted elsewhere.
The process is very simple, either a service is selected from a dropdown menu and then a repo can be chosen and the URL for a repository can be added in the specified field. Once that's done, the repository is now uploade into BitBucket and can be edited, forked and compared to other repos hosted there.
Pro Supports hosting static websites
BitBucket supports uploading and hosting static HTML pages for it's users.
Pro Unlimited contributors for private repositories for students/educators
Atlassian offers student licenses for both students and educators for Atlassian products that will be used in a classroom setting for education. This includes BitBucket, which means that students and teachers can have unlimited private repositories with and unlimited number of contributors.
Pro Backed by a trustable company that has proved it's worth
BitBucket is developed and maintained by Atlassian, which is not an unknown venture, especially for developers. Atlassian has a great number of other products used by million of users worldwide, including JIRA, HipChat, Confluence and Stash.
Pro Mercurial support
Pro Easy Trello integration
You can link BitBucket with your Trello board easily.
Con Private repositories are free for only 5 users
Private repositories are free for teams with 5 members or less. If a team is larger, then BitBucket charges for each additional team member.
Con Not as stable as github
Users have experienced several half a day downtimes, almost every month. True, github is down once in a while, but when GitHub is down complaints breaks loose on Twitter, TechCrunch, and other major media outlets. For the past 5 years github has been down only three times, and two of these times they were attacked by major adversaries.
Con Requires registration of a "universal atlassian account"
Not a big con for some, but annoying to others.