Phabricator is a suite of web-based software development collaboration tools. Developed by Phacility, Inc.
License: Open Source
Phabricator is a highly customizable suite primarily aimed at developers, offering strong code review and project tracking features, while YouTrack is designed for agile project management with an intuitive interface and powerful query capabilities. Both tools cater to different needs, with Phabricator focusing on development workflows and YouTrack emphasizing agile methodologies.