GitLab had the really cool CI/CD features before Bitbucket was getting some attention in this area.

Also you have to differentiate Stash (on-prem; Java) and Bitbucket (on-demand [if it works haha]; Python).

Bitbucket was meant to be used with Bamboo for pipelining so it was just a GUI for managing repos.

GitLab is open source! That is a big advantage in itself.

For some more take a look at this: https://about.gitlab.com/devops-tools/bitbucket-vs-gitlab.ht...