Jenkins is the leading open-source automation server that enables continuous integration and continuous delivery (CI/CD) for software projects, targeted at developers and DevOps teams.

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🚀 Overview

Jenkins is an extensible open-source automation server written in Java that provides hundreds of plugins to support building, testing, deploying, and automating any project. It started as Hudson, created by Kohsuke Kawaguchi at Sun Microsystems in 2004 because he was tired of the manual hassle and team blame when code broke builds. Due to governance issues with Oracle after acquiring Sun, the community renamed and continued it as Jenkins in 2011 under the Continuous Delivery Foundation.

It solves the problem of manual, error-prone, and slow software development workflows by automating CI/CD pipelines, enabling faster feedback loops, distributed builds, and integration with countless tools.

Built for developers, DevOps engineers, and organizations of all sizes—from indie hackers to enterprises—who need reliable automation.

The community built it to provide a free, highly customizable alternative to proprietary CI/CD tools with open governance and massive extensibility.

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✨ Key Features

• Extensive Plugin Ecosystem (over 2,000 plugins): Integrates with virtually every CI/CD tool, enabling custom workflows for build, test, deploy, and more—what matters for infinite extensibility.
• Pipeline Support: Declarative and scripted pipelines in Groovy for defining complex automation as code.
• Distributed Builds: Easily scale across multiple machines and platforms to speed up testing and deployment.
• Easy Setup and UI: Self-contained Java app with intuitive web interface, redesigned modern UI, and on-the-fly error checks.
• Optional: Ongoing UI redesigns and experimental APIs for future enhancements.

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🛠 Tech Stack

• Frontend: HTML, JavaScript, SCSS, CSS
• Backend: Java (core), Groovy (pipelines)
• Database: File-based (jobs/configs), plugins for external DBs like PostgreSQL
• Auth: Built-in or plugins (e.g., LDAP, OAuth)
• Hosting: Self-hosted (Docker, native packages, WAR), Kubernetes via operators

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👥 Who Is This For?

This project is useful for:

• Developers who want to automate CI/CD pipelines and avoid manual builds
• Teams looking for scalable, plugin-rich automation servers
• Organizations building continuous delivery hubs for any project scale

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📸 Screenshots / Demo

• Live demo: https://www.jenkins.io/download/ (download WAR/Docker and run locally)
• GitHub: https://github.com/jenkinsci/jenkins

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Open Source (MIT License) (Completely free to use, with community and commercial support options.)

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Is the source code available?

Yes — https://github.com/jenkinsci/jenkins

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Can I contribute?

Yes — Check CONTRIBUTING.md for guidelines, report issues on JIRA/GitHub, submit PRs, improve docs, or join Special Interest Groups, chats, and events.

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📬 Contact & Links

• Website: https://www.jenkins.io
• GitHub: https://github.com/jenkinsci/jenkins
• Twitter/X: https://twitter.com/jenkinsci
• Email: Via mailing lists at https://www.jenkins.io/mailing-lists/

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