DotCi vs GitLab CI: What are the differences?
Developers describe DotCi as "Jenkins plugin with GitHub and Docker integration". DotCi is a Jenkins plugin created by Groupon that makes job management easy with built-in GitHub integration, push-button job creation, and YAML powered build configuration and customization. It comes prepackaged with Docker support as well, which means bootstrapping a new build environment from scratch can take as little as 15 minutes. DotCi has been a critical tool for Groupon internally for managing build and release pipelines for the wide variety of technologies in their SOA landscape. On the other hand, GitLab CI is detailed as "GitLab integrated CI to test, build and deploy your code". GitLab offers a continuous integration service. If you add a .gitlab-ci.yml file to the root directory of your repository, and configure your GitLab project to use a Runner, then each merge request or push triggers your CI pipeline.
DotCi and GitLab CI can be categorized as "Continuous Integration" tools.
DotCi is an open source tool with 505 GitHub stars and 65 GitHub forks. Here's a link to DotCi's open source repository on GitHub.