The code delivery pipeline consists of issues, IDE, code hosting, CI, code review, configuration management, Continuous Delivery (CD) and a PaaS service. Code hosting is a first step and getting all the rest right is a lot of work. Services working on getting the IDE right are Koding, Nitrous.io, Cloud9, CodeAnywhere, Codio and CodeEnvy. And I suspect that GitHub Atom is running in a web-browser so they can effortlessly offer it online in the future. For configuration management you want to integrate with Chef, Puppet, Ansible, Salt and Docker.
At GitLab we offer CI and CD via GitLab CI. We hope for a multi-cloud future where organizations will deploy to different cloud providers. They will use PaaS software that spans the different IaaS providers. Cloud independent PaaS software offerings are CloudFoundry, OpenStack, OpenShift, Kubernetes, Mesos DCOS, Docker Swarm and Flynn. We want to ensure that GitLab is the best option to do code collaboration upstream from these offerings.