Dropbox uses Phabricator extensively for all our projects. Integrations into CI and deployment systems, etc. Great project. I've used trac, redmine, bugzilla

Dropbox uses Phabricator extensively for all our projects. Integrations into CI and deployment systems, etc. Great project. I've used trac, redmine, bugzilla, github/github enterprise, over the last ~10 years, and taken across the whole feature set, Phabricator outshines all of them. All the integrations across the product suite are nice, and the arc tool is really convenient once you get used to its quirks. It's not the simplest thing in the world, but if you have a bigger shop with some nontrivial workflows, lots of projects, lots of teams, blocking reviews, mandatory security reviews, etc... Phabricator is a great way to wrangle it.