Fisheye is a revision-control browser[1] and search engine owned by Atlassian, Inc.

Although Fisheye is a commercial product, it is freely available to open source projects and non-profit institutions.

[2] In addition to the advanced search[3] and diff capabilities,[4] it provides: Atlassian approves free licenses for community and open-source installations[2] under certain conditions.

Many major open source projects use Fisheye to provide a front-end for the source code repository:[8] Atlassian provides free licences of Fisheye and Crucible for open-source projects.

As of 2010[update] Fisheye supported integration with the following revision control systems:[10] Due to the resource-based URLs, it is possible to integrate Fisheye with different issue and bug tracking systems.