CI in Gitlab is one YAML file you check into source control with each project. CI in TFS is navigation through a bunch of menus. Gitlab can be fully installed

CI in Gitlab is one YAML file you check into source control with each project. CI in TFS is navigation through a bunch of menus. Gitlab can be fully installed as one Docker container, plus a second container if you want a CI runner (although, to be fair, it took me a while to make them talk to each other). Upgrading Gitlab is just starting a container for the new version with the old one's data. TFS is... not as straightforward. Also, cost.