GitLab on the other hand is focused on solving every facet of the development lifecycle within their core product. From their blog post about GitHub's acquisition:
> ... instead of integrating multiple tools together, we believe a single application, built from the ground up to support the entire DevOps lifecycle is a better experience leading to a faster cycle time.
It will be interesting to see how the different strategies play out.
[0] https://github.com/marketplace [1] https://github.com/marketplace/pull-reminders/