[sdesol]

Disclaimer: I'm the creator of GitSense which is focused on Git analytics and search

Right now it doesn't support analyzing/visualizing merges/pull requests, but it will down the road. What it does really well right now, is it lets you analyze changes across branches, which is a precursor to merge/pull requests analytics. Below is an example of how you can use it to analyze two branches from the rethinkdb project:

https://gitsense.com/insight?c=bitbucket:gitsense/contexts:g...

I write a bit more about how the tool works in the GitSense blog:

https://gitsense.com/blog

Right now I'm working on deep integration with Bitbucket and Microsoft, but you can use the standalone web tool, to analyze repos from GitHub/GitHub Enterprise, Bitbucket Cloud/Server or GitLab Server/Cloud. If GitHub and GitLab supports injection points in their product, I'll provide deep integration with them as well.