Currently cloud-only but an on-premises version has been announced. So while Atlassian goes cloud-only, Jetbrains is going in the other direction.
I'm a heavy JetBrains user but I've found their server side offerings to be lacking. I haven't been a fan of YouTrack in the past but maybe it's time to give them another try.
Looks interesting, like a JetBrains Azure DevOps/VSTS.
Yes, they are going for a “all in one” including project and team org functions, source control etc. I’ve been using it for pet projects since the beta.