title: How do travis-ci and gitlab-ci compare?
body: <p>As far as I understand, the main difference is that gitlab-ci is opensource (you can install it on your own server) and travis-ci isn't.</p>
  
  <p>So then the latter is always cloud/service-based. And it's free for open source projects.</p>
  
  <p>But then GitLab.com (the company, not the software) also has a cloud version that you don't need to install: <a href="https://ci.gitlab.com/" rel="noreferrer">ci.gitlab.com</a>. And I'm guessing this version can only be used with public repositories posted in your Gitlab account.</p>
  
  <p>But then, there's almost no documentation out there about running GitLab CI this way. Most of the docs I find are about installing the GitLab CI server or the runners. But how are the ci.gitlab.com's runners configured? What OS do they have? Can I have Windows/Mac runners? (The software supports these OSs apparently, but it's not specified what runners are supplied by ci.gitlab.com's service.)</p>