Crucible is a collaborative code review application by Australian software company Atlassian.

Like other Atlassian products, Crucible is a Web-based application primarily aimed at enterprise, and certain features that enable peer review of a codebase may be considered enterprise social software.

[2] Crucible is particularly tailored to remote workers,[3] and facilitates asynchronous review and commenting on code.

[4] Crucible also integrates with popular source control tools,[5] such as Git and Subversion.

Crucible is not open source, but customers are allowed to view and modify the code for their own use.