GitHub Actions suits teams whose code already lives on GitHub and who want CI/CD with no server to maintain, and it's free for public repositories and self-hosted runners. Jenkins suits teams that want a free, open source automation server they run themselves, with hundreds of plugins and full control over where builds happen. The trade-off is maintenance: Jenkins gives you control, while GitHub Actions takes the server work off your plate.
Every team that ships software needs something to build, test and deploy it, and these two come up again and again. I read GitHub's Actions page and its Actions billing documentation, and the Jenkins home page, user documentation and plugin index.
GitHub Actions and Jenkins at a glance
| GitHub Actions | Jenkins | |
|---|---|---|
| What you get | CI/CD and automations built into GitHub | Self-contained open source automation server |
| Who runs it | GitHub, or your own self-hosted runners | You, on your own machine or server |
| Free use | Public repos and self-hosted runners | Free and open source |
| Private repos | Free minutes and storage by plan, then charged | No usage charges from Jenkins itself |
| Extending it | Workflows and actions in your repository | Hundreds of plugins |
| Install | Nothing to install for hosted runners | Native packages, Docker or any machine with Java |
Who gets charged when a workflow runs
GitHub's billing docs contain two rules worth knowing before you switch on Actions for a private repository. Minutes are charged to the repository owner, not to the person who triggered the run, and anyone with write access to a repository can run actions. The docs also say each Copilot code review consumes Actions minutes as well as AI credits. Use on public repositories with standard GitHub-hosted runners, and on self-hosted runners, is free, and your free minutes reset at the start of each billing cycle.
Why teams choose GitHub Actions
The main draw is that there's nothing to run. Your workflows sit in the same repository as your code, and GitHub provides the machines. Private repositories get a quota of free minutes, artifact storage and cache storage that depends on your plan. If you'd rather use your own hardware, self-hosted runners keep the GitHub workflow with no minute charges.
There's a middle path worth knowing. Because GitHub's billing docs say self-hosted runners are free to use with Actions, you can keep workflows in GitHub while builds run on your own machines, including ones inside your private network. Jenkins, for its part, can run in Docker, so it's easy to stand up a test server before you commit. Either way, you won't be locked in on day one, and that's worth knowing before anyone argues for a big migration.
Why teams stay with Jenkins
The project describes itself as the leading open source automation server, with hundreds of plugins to support building, deploying and automating any project. Its docs say it's self-contained and can be installed through native system packages, Docker, or run standalone on any machine with a Java Runtime Environment. Its main feature is Pipeline, and it's a community-driven project, which matters if you want no vendor between you and your build system.
Checklist before you move pipelines
- Where does your code live today?
- Who will patch and back up a Jenkins server?
- How many build minutes do your private repositories use a month?
- Do builds need special hardware or access to private networks?
- Which plugins or actions do your current pipelines depend on?
AI helpers speed up writing pipeline files, so see this list of AI coding assistants and these ChatGPT prompts for faster coding work.
My advice on GitHub Actions or Jenkins
If your code is on GitHub and you don't have someone who wants to look after a build server, use GitHub Actions and watch your private repository minutes in the first month. If you need builds on specific hardware, inside a private network, or with plugins your team already relies on, Jenkins is still a strong, free choice. You can also mix them by running GitHub Actions on self-hosted runners, which keeps the workflow and avoids the minutes.
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Frequently asked questions
Is GitHub Actions free?
GitHub says Actions is free for self-hosted runners and for public repositories that use standard GitHub-hosted runners. Private repositories get a free quota based on the account's plan.
Is Jenkins free?
Yes. Jenkins is a free, open source automation server.
Who is charged for GitHub Actions minutes?
GitHub's docs say minutes are charged to the repository owner, not the person who triggered the workflow.
What does Jenkins need to run?
Jenkins can run from native system packages, Docker, or standalone on any machine with a Java Runtime Environment installed.
Do Copilot code reviews use Actions minutes?
Yes. GitHub's billing docs say each Copilot code review consumes GitHub Actions minutes in addition to AI credits.
