diff --git a/doc/integration/README.md b/doc/integration/README.md
index 00c73afd872..357ed038314 100644
--- a/doc/integration/README.md
+++ b/doc/integration/README.md
@@ -10,3 +10,12 @@ See the documentation below for details on how to configure these services.
 - [Slack](slack.md) Integrate with the Slack chat service
 
 Jenkins support is [available in GitLab EE](http://doc.gitlab.com/ee/integration/jenkins.html).
+
+## Project services
+
+Integration with services such as Campfire, Flowdock, Gemnasium, HipChat, PivotalTracker and Slack are available in the from of a Project Service.
+You can find these within GitLab in the Services page under Project Settings if you are at least a master on the project.
+Project Services are a bit like plugins in that they allow a lot of freedom in adding functionality to GitLab, for example there is also a service that can send an email every time someone pushes new commits.
+Because GitLab is open source we can ship with the code and tests for all plugins.
+This allows the community to keep the plugins up to date so that they always work in newer GitLab versions.
+For an overview of what projects services are available without logging in please see the [project_services directory](https://gitlab.com/gitlab-org/gitlab-ce/tree/master/app/models/project_services).