Bitbucket's bug tracker vs Bugsnag

Bitbucket offers unlimited private repositories for free, as long as the number of members in a team is not larger than 5. BitBucket does not use GitHub's pricing plan, instead of charging users for each private repo, it charges teams per number of team members. It is free for up to 5 people.

Has full support for both Mercurial and Git VCS.

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 which can be connected to BitBucket and other code hosting services.

BitBucket supports GitHub, Twitter, Facebook, OpenID, Google and even GitHub authentication.

Clear, concise documentation. Plus docs on cross-domain script errors and enabling CORS.

Bugsnag can be set up to send email notifications as soon as exceptions occur. It can also integrate with a number of third-party services that can be used for notifications including Campfire, HipChat, Twilio SMS and custom solutions via Webhook.

Bugsnag integrates with a wide variety of 3rd party tools to automatically create issues or tickets. Integrations include GitHub, BitBucket, UserVoice, Trello and many, many others.

After a two-week full-featured free trial period the user is limited to 2,000 errors/month, 1 user and 1 project.

Bugsnag groups similar exceptions together displaying the number of occurences so that there's no need to deal with each instance of the error separately.

Their documentation was well organized, easy to search through for the platform of choice and quick work of full product integration.

Drop in place integration with Unity 3D, only a simple API Token configuration on game object and everything was up & running with almost zero code written.

Not many products have decided to finally start doing this, phabricator now has a champion.