Jenkins originated as Hudson, created by Kohsuke Kawaguchi at Sun Microsystems in 2004. After Oracle acquired Sun, a naming dispute led the community to fork the project as Jenkins in 2011. It’s now governed by the Continuous Delivery Foundation and remains the most popular CI/CD server in the world.
Jenkins runs on Java and can be installed on virtually any operating system. Its plugin ecosystem is enormous — over 1,800 plugins covering everything from source code management to deployment targets. If you need to integrate with a tool, there’s probably a Jenkins plugin for it already.
Pipelines are defined using Jenkinsfiles, which can be written in either declarative or scripted syntax using Groovy. The declarative syntax is simpler for common use cases, while the scripted syntax gives full programming flexibility. Jenkins supports distributed builds through its agent architecture, letting teams scale horizontally by adding more build nodes.
While newer CI/CD tools have gained popularity, Jenkins still dominates in enterprise environments. It handles millions of builds daily across organizations of all sizes. Jenkins X extends the platform for cloud-native applications on Kubernetes. The project has over 23,000 GitHub stars and a massive community of contributors. Its biggest advantage is flexibility — you can customize virtually every aspect of your build pipeline.
