The community/FOSS version mainly lacks the kind of reporting that jira has (the paid/Enterprise version has some basic reports, such as burndown charts). It's not perfect, but it's fast, simple and has an easy API and webhooks.
In the field I work in (CRM/webdev/consulting), JIRA used to be everywhere. Now all those shops have moved to Gitlab.
Phabricator is pretty good except it has pretty much zero CI integration. Kind of annoying.
You also have to pay to even comment on issues. I think that's a pretty great way of getting companies to pay for support but it's also annoying if you want to work with other freeloaders on issues.
Also it's written in PHP which means you aren't ever going to want to read or modify the code. No different to GitHub, or probably even GitLab but I can definitely imagine modifying Gogs/Gitea.
OP mentioned "non-cloud", so I assumed they wanted it self-hosted. You don't have to pay anyone for commenting in Phabricator when you're self-hosting it.
Err, I think you misunderstood. You have to pay to comment on issues about Phabricator. On their official bug tracker. Like, if you find a bug, or a solution for a known bug, you can't tell them without paying.
Doesn't have anything to do with cloud hosting our self-hosting.
