Jenkins
Open-source automation server with 1,800+ plugins for CI/CD, testing, deployment, and any automation task. Self-hosted with full control.
Use Cases
Free Tier
100% free and open source — self-host with unlimited builds, agents, users, and plugins
How to Maximize the Free Tier
Jenkins is completely free and open source under the MIT license. Deploy via Docker (one command) or install directly on any OS. The 1,800+ plugins cover everything from GitHub integration to Docker builds to deployment pipelines. Use Jenkins Pipeline (Jenkinsfile) for version-controlled, code-first CI/CD. The Blue Ocean plugin provides a modern visual pipeline editor. Run agents on separate machines to distribute builds and avoid overloading the controller. Use the built-in credential store to manage secrets securely. The tradeoff is operational overhead — you maintain the server, plugins, and security updates yourself.
Getting Started
Install Jenkins via Docker (docker run -p 8080:8080 jenkins/jenkins:lts) or package manager → unlock with the initial admin password → install suggested plugins → create admin user → create a Pipeline project → point to your Git repo → write a Jenkinsfile or use the visual editor → commit to trigger builds.
Pros
- Plugin ecosystem: 1,800+ plugins cover virtually every tool, service, and workflow in the CI/CD space
- Full control: Self-hosted with complete control over infrastructure, security, and pipeline logic
- Mature and proven: Battle-tested since 2011 with a massive community and extensive documentation
Cons
- Operational burden: You manage the server, plugin updates, security patches, and infrastructure yourself
- UI dated: Classic UI feels outdated compared to modern CI/CD platforms — Blue Ocean helps but is in maintenance mode
- Java overhead: Requires Java runtime and can be resource-heavy compared to lightweight alternatives like Woodpecker