GitLab CI is an open-source continuous integration and deployment solution.
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
All of GitLab CI's code is open source and under the MIT license.
Pro Parallel builds lessen test times
Tests are parallelized across multiple machines in order to reduce test times considerably.
Pro Docker Intergration
Good integration with Docker.
Pro File based configuration
All build setup are stored in .gitlab-ci.yml file, which is versioned and stored in the project. Like Travis do.
Pro Highly scalable
The tests of GitLab CI run parallel to each other and are distributed on different machines. Developers can add as many machines as they want or need, making GitLab CI highly scalable to the development team's needs.
Pro Quick setup for projects hosted on GitLab
Since it uses the GitLab API for setting up hooks, the setup of GitLab CI for projects hosted on GitLab can be done in one click.