Other way around. They made Stash in house, they bought BitBucket, and rebranded Stash as BitBucket Server. The BB acquisition happened before Stash was released but Stash was not an acquisition.
I was of the impression that they bought Stash, renamed it to Bitbucket Server, and stopped development, while slowly attempting to reimplement stash code into Bitbucket cloud, one feature at a time?
When BitBucket was acquired they were cloud only, and when Stash launched it was on-prem only. We used Stash and BitBucket Cloud around that time at the place I was working and I can definitely tell you that on-prem Stash was definitely not a reskinned on-prem BitBucket Cloud; for one I’m pretty sure BitBucket Cloud was written in Python (Django) and Stash was a typical Atlassian Java product.
