Bitbucket

Pros

Bitbucket is private repository with lots of feature and multiple language support.
In my daily use, I mostly commit Java applications using the scrum board.
I have used the cloud version for almost three years. In my previous company and now at my current one.
One of the best features is the code review following the git flow workflow. You can select the source and target branch for the pull request and you can select default approvers as well as define your own one.

Cons

The project administration, especially the setup of the permissions for a particular repository tends to be quite hard. And when you try to contact support, usually there is no help at all and you end up researching on forums to be able to find the answer you're looking for.
In this kind of software, especially if a company like Attlassian is behind it, the support should be better.

Pros

A better integration with other Atlassian products as well as other products like Slack, the very useful pipeline feature that automates the building process, the simplest interface, private repositories even for free users.

Cons

To get the most and complete experience for this product is only if you have the Atlassian ecosystem,
not so stable as GitHub, but this problem is not common, unable to archive repositories, the search needs a little bit improvement.

Pros

First of all it is free for small team. For bigger teams it has really reasonable prize. I personally love and prefer Atlassian's products such as Bitbucket, Trello. The Atlassian team behind the product continuously improves their products. Since I started using Bitbucket 5 years ago, they added many features. It has no limitation and pretty good integration with trello, jira and other project management products.

Cons

Fortunately, during the last 5 years we didn't face any difficulties using Bitbucket. It works pretty well with my team. But keep-in mind that free version is only for 5 developers for a team.

Pros

I like the auto-tagging of JIRA issues with code commits on PR. The bare minimum requirement for a functional version-control system is fulfilled.

Cons

Github has started supporting multi-line commenting on PRs. I don't think I can find any dev who won't like this feature.
It also has a colorful README rendering along with build and test coverage tags. I don't care much about README renders but am out-of-the-box CI integration with Jenkins can help in outputting data about many useful tags like code test coverage, code standards, reference available or even licensing.
There are many extensions built around Github to augment the experience, one in particular that I like, called OctoLinker, has the ability to link the imports with original source code repository. This could be a useful feature in source code view.

Pros

Bitbucket has excellent git integration with many visual resources. The code review process is the best is my option compared with other Git as a service. The repositories organization fits very well for companies that avoid getting a mess quickly with many repositories. In a paid plan is available great audit logging.

Cons

The members limit on private repositories in a free plan. The permission management on repositories could be easier. It is tough to find and download the "bill/receipt of payment." which is a very common requirement for Brazillian companies.