Jenkins originated from the Hudson project in 2005 and became independent in 2011. It is the world's most popular open-source CI/CD server with a 1000+ plugin ecosystem and Pipeline as Code.
GitHub Actions is GitHub's native CI/CD and automation platform launched in 2018, offering 15,000+ community Actions, matrix builds and generous free tiers for end-to-end code automation within the GitHub ecosystem.
CircleCI is a cloud CI/CD platform founded in San Francisco in 2011, known for smart parallel builds, test splitting and Docker-native support that can shorten build times by up to 4x.
Founded in 2011, GitLab is an open-source DevOps platform that unifies code hosting, CI/CD, and security scanning in a single application, serving 30M+ developers and 100K+ enterprise customers with SaaS and self-managed deployment.
TeamCity is JetBrains' enterprise CI/CD server launched in 2006 in Prague, Czech Republic, serving 30,000+ teams with intelligent build agents, build chains, and quality gates.
Semaphore CI is a cloud CI/CD platform founded in 2012 in San Francisco, USA, known for being 10x faster with Docker-native builds and parallel testing.
Buildkite is a hybrid CI/CD platform founded in Australia in 2013, letting 3000+ teams run builds on their own infrastructure with self-hosted agents plus cloud orchestration, balancing flexibility, security and low ops.
Wercker is a container CI/CD platform founded in 2012 in Amsterdam, Netherlands, and acquired by Oracle in 2015, known for Docker-native builds and declarative YAML pipelines.
Drone CI is a lightweight container-native CI/CD platform under Harness, known for single-binary deployment and simple YAML configuration, running each build step in its own Docker container with support for GitHub, GitLab, and Bitbucket.
CodeShip was CloudBees' cloud CI/CD service offering deep GitHub/Bitbucket integration for continuous integration and deployment; the product reached end-of-life in January 2026, and CloudBees recommends migrating to CloudBees Unify and other platforms.
Buddy is a CI/CD platform founded in Warsaw, Poland in 2014, featuring a drag-and-drop visual pipeline, native Docker/Kubernetes deployment, and parallel builds, with deep integration for GitHub, GitLab, and Bitbucket.
Travis CI is a hosted CI service founded in Berlin in 2011 and one of the first to deeply integrate with GitHub, automating build and test via a single .travis.yml file, free for open source.