Jenkins vs GitLab CI vs GitHub Actions for Small Teams

Jenkins, GitLab CI and GitHub Actions all do the same core job: run your build, tests and deployment steps whenever code changes. The difference is where the pipeline runs and who maintains the server. The short answer for a small team: use the CI built into the platform that already hosts your Git repositories. That means GitHub Actions on GitHub and GitLab CI/CD on GitLab. Pick Jenkins when everything must run on your own hardware, or when you already have years of jobs in it. Facts below were checked against the official documentation on 17 October 2026. Not tested yet: we have not benchmarked these tools, so there are no speed claims here.

Side-by-side comparison

What the pipeline looks like in each tool

The same two steps (build, test) in each system show how different the day-to-day work is. In Jenkins, a declarative pipeline lives in a Jenkinsfile. The Jenkins documentation describes a declarative pipeline { } block with a required agent, plus stages and steps; a scripted node { } style exists for advanced cases.

pipeline {
    agent any
    stages {
        stage('Build') {
            steps { sh 'make build' }
        }
        stage('Test') {
            steps { sh 'make test' }
        }
    }
}

In GitLab, the pipeline documentation explains that stages run in sequence, while the jobs inside one stage run in parallel:

stages: [build, test]

build-job:
  stage: build
  script: make build

test-job:
  stage: test
  script: make test

In GitHub Actions, the workflow syntax reference says workflow files must be stored in .github/workflows and end in .yml or .yaml. Jobs run in parallel unless you chain them with needs:

on: [push, pull_request]
jobs:
  build-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: make build
      - run: make test

Cost and maintenance

Jenkins is free software, but the server is yours to look after. The installation guide says current Jenkins needs Java 21 or later, lists a minimum of 256 MB of RAM and 1 GB of disk, and recommends 4 GB or more of RAM and 50 GB or more of disk for a small team. It listens on port 8080 by default. Plan for updates, plugin compatibility and backups of the Jenkins home directory. Jenkins publishes an LTS line and a weekly line; use LTS for production.

GitHub Actions is billed by use. According to GitHub’s billing documentation, standard GitHub-hosted runners are free in public repositories and self-hosted runners are free. Private repositories get a monthly allotment of minutes that depends on the plan, and usage beyond it is billed to the account’s payment method. Larger runners are always billed.

GitLab CI/CD runs on runners. GitLab-hosted runners are available on GitLab.com for Linux, Windows and macOS and each job gets a fresh VM. Self-managed runners can be used on GitLab.com or on a GitLab you host yourself. Quotas and paid tiers change, so check the current plan page before relying on a limit.

Reaching servers inside your network

This is the practical dividing line for sysadmins. A hosted runner cannot reach a private subnet, so deployments to internal servers need a self-hosted runner or agent in all three tools. Jenkins is designed around that model. GitHub Actions and GitLab CI both support it with self-hosted runners; install one on a small VM inside the network and label it so only deployment jobs use it. If those jobs configure servers, call Ansible from the pipeline rather than writing long shell scripts. For a throw-away test environment, Vagrant can create a clean VM to run the same playbook against before it touches production.

Which one should you choose?

• Your code is on GitHub: start with GitHub Actions. There is no server to run and workflows live next to the code.
• Your code is on GitLab, or you want one self-hosted platform: use GitLab CI/CD. Repositories, merge requests and pipelines are in one place.
• Everything must stay on your own hardware, or you have many legacy jobs and unusual integrations: use Jenkins, and budget time for patching.
• Mixed estate: do not run three systems for one team. Pick one, keep the pipeline file in the repository, and keep build logic in scripts so a later move is cheap.

For the wider picture, including Infrastructure as Code and configuration management, see our DevOps automation tools hub. If your pipelines deploy to local virtual machines, the virtualization and container tools hub covers the platforms.

Limitations

This comparison is based on official documentation, not on our own runs. We have not tested build times, plugin quality or migration between the tools. Plans, quotas and version numbers change often; check each vendor’s page before you commit.

FAQ

Which is better, Jenkins or GitHub Actions?

It depends on where your code lives and who maintains the server. GitHub Actions needs no server for hosted runners; Jenkins gives full control on your own hardware at the cost of upkeep.

Is Jenkins free?

Yes. Jenkins is open source under the MIT licence. You pay only for the hardware or VM it runs on.

Is GitHub Actions free?

Standard hosted runners are free in public repositories and self-hosted runners are free. Private repositories get a plan-dependent monthly allotment, and extra usage is billed.

What is the difference between a GitLab Runner and a Jenkins agent?

Both execute jobs on a machine. A GitLab Runner picks up jobs defined in .gitlab-ci.yml and can use Shell, Docker or Kubernetes executors. A Jenkins agent connects to the Jenkins controller and runs stages from a Jenkinsfile.

Can I use GitLab CI without hosting GitLab?

Yes. GitLab.com offers hosted runners, and you can also attach your own self-managed runners to it.

Which one is easiest to start with?

GitHub Actions on GitHub, or GitLab CI on GitLab.com, because there is nothing to install for the first pipeline.

Last updated: 17 October 2026 · ITForgePro editorial team. Licence, version and platform details are checked against each developer's official documentation.