1. Language aware code navigation and search.
2. Source and diff comment for code discussion and comprehension.
3. Rules to protect branches, tags, or files.
4. Intelligent commit query and subscription.
5. Advanced pull request for efficient code review.
6. Sophisticated pull request query and subscription.
7. Custom issue states and fields for flexible workflows.
8. Powerful issue query and subscription.
9. Coherent and self-updating issue boards.
10. Cross references amongst code, issues and builds.
Which are cool advanced features and all, but I don't know how they could compete with GitHub and GitLab ... any features that are useful or which put GH/GL at a disadvantage will simply be cloned by the larger orgs' armies of developers. Features aren't defensible.
I guess it's open source, so the developers get to define success simply as "this exists for me to use, because I want those features" or anything else they want. There's no sign of a for-pay version on their website, so I guess it might not a direct commercial competition to GH/GL. Creators: are you around to tell us what you're doing with OneDev?