$ ~/cicdcalculator

GitLab CI vs Jenkins in 2026
./compare --gitlab --jenkins --self-hosted-tco

GitLab CI and Jenkins are the two big self-hostable CI/CD options that have substantial production user bases. Both are free as software. Both run on cloud VMs you operate. Both have first-class support for the same OS targets and language toolchains. The difference between them is almost entirely architectural and operational, and it shows up in the size of the operator role you take on and the day-to-day developer experience your engineers have. This page works through both honestly.

Sources: GitLab pricing page for SaaS reference, Jenkins source, AWS rates from EC2 on-demand.

Licence and software cost

EditionGitLab CIJenkins
Open sourceGitLab CE (MIT-style)Jenkins (MIT)
Cloud SaaS$29 / user (Premium)n/a (not offered by Jenkins project)
Enterprise self-hosted$29 (Premium), $99 (Ultimate)$40K+/yr CloudBees CI

Self-hosted infrastructure cost

A small-team production GitLab CE setup on AWS typically runs around $150 monthly: one controller instance at $80, two runner agents at $35 each. The omnibus package contains everything; you do not need a separate database or cache instance unless you scale to thousands of users.

A small-team production Jenkins setup on AWS typically runs around $160 monthly: one controller at $80, two agents at $35 each, plus a small Postgres RDS for state at $10. Functionally identical infrastructure cost. The real difference is what comes after the bill arrives.

For larger deployments, both scale on the same axes: more agents for more parallel build capacity, separate database tiers for high-availability, autoscaling groups for variable load. A 100-developer Jenkins or GitLab CE deployment on AWS lands in the $400-$700 monthly infrastructure range. The architectural patterns (controller plus agents plus shared storage) are similar enough that AWS or GCP architects experienced with one transfer their experience cleanly to the other.

Operator-time TCO

The dollar difference between GitLab CE and Jenkins is small. The operator-time difference is significant.

GitLab CE shipping as a single omnibus package or Helm chart that updates atomically means upgrades are typically a weekend project once a quarter. The release notes are clear, breaking changes are documented in advance, and the rollback path is well-defined. Typical operator time on a healthy GitLab CE deployment is 2-6 hours per month including occasional troubleshooting and quarterly upgrades.

Jenkins shipping as core plus a hundred-ish plugins means plugin upgrades are the dominant operational task. Plugin compatibility breaks across major Jenkins releases. CVEs in popular plugins arrive every few weeks. Major Jenkins core upgrades happen every 1-2 years and require careful staging because plugin compatibility is unpredictable. Typical operator time on a healthy Jenkins deployment is 4-12 hours per month, twice the GitLab CE baseline.

At a fully loaded engineering rate of $150 per hour, the operator-time difference is $300-$900 per month implicit cost in favour of GitLab CE. For most teams making the build-versus-buy decision, this is the load-bearing fact.

Developer experience

GitLab CI configuration lives in .gitlab-ci.yml in the repository, in declarative YAML. The pipeline UI shows job dependencies, stage progression, environment deploys, and merge-request gating all in one view. Most engineers can become productive editing GitLab CI pipelines in a few hours.

Jenkins pipelines can live in Jenkinsfiles in the repo (declarative or scripted Groovy) or be configured through the Jenkins UI. Either way, the configuration surface is broader and the patterns less uniform. Older Jenkins shops accumulate decades of bespoke Groovy logic, shared libraries and global config that nobody fully understands. Onboarding a new engineer to a mature Jenkins setup is meaningfully harder than onboarding them to a comparable GitLab CI setup, and this is a real cost.

Jenkins's flexibility advantage is real but priced. Almost anything is possible because the platform supports unlimited customisation. The cost is the entropy that customisation produces. Teams that value uniform pipelines across many projects tend to prefer GitLab CI for the discipline it enforces.

When to choose each

Default to GitLab CE for greenfield self-hosted CI/CD. The operational simplicity, the integrated source control plus CI plus container registry, and the lower operator burden make it the easier long-term commitment.

Stay on Jenkins if you have a mature Jenkins setup that already works and your team has the platform engineers to operate it. The migration cost to GitLab or any other platform is substantial, and the day-to-day cost saving rarely justifies the migration project within an 18-month payback window.

Consider Drone CI or Woodpecker CI if you specifically want a lighter-weight self-hosted alternative that does less than GitLab CE but is even simpler to operate. These projects target small teams who want Docker-native pipelines without the GitLab platform around them.

Consider Buildkite if you want a self-hosted-compute model but with a managed control plane. Buildkite splits the responsibility cleanly: you operate the agents, Buildkite operates the orchestrator and UI.

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Frequently Asked Questions

# click any question to expand

Are both free if self-hosted?>
Yes. GitLab Community Edition is open source and self-hostable at zero licence cost. Jenkins core and most popular plugins are open source under MIT. The cost difference is operational: Jenkins typically requires 4-20 hours per month of admin time, GitLab CE typically requires 2-8 hours. Both involve some infrastructure cost (VMs to run the server and runners). The dollar comparison usually favours GitLab CE because the operator burden is lower on a comparable workload.
What is the difference between GitLab CE and GitLab Premium?>
GitLab CE (Community Edition) is the open-source self-hosted version. GitLab Premium is the commercial offering, either SaaS or as the self-hosted Premium / Ultimate enterprise license. Premium adds support, security scanning, audit logs and other enterprise features. Most CI/CD functionality is in CE; Premium is bought when you need the enterprise governance features.
Which is easier to operate?>
GitLab CE, in most cases. The platform ships as a single omnibus package or a Helm chart that includes everything (web server, postgres, sidekiq, redis, gitaly). Plugin management is largely absent; features ship as part of the GitLab release. Jenkins requires assembling functionality from plugins and managing version compatibility, which is the single biggest operator-time sink in a typical Jenkins deployment.
Which has the better ecosystem?>
Jenkins on raw count of plugins (1,800+) but GitLab on quality and integration depth. Jenkins plugins vary wildly in quality and many are unmaintained. GitLab's built-in features cover most needs without needing additional plugins. For specific integrations, Jenkins probably has one and GitLab probably does not, which matters most for teams with unusual requirements.
Which is more secure?>
GitLab CE has a smaller attack surface because the feature set is bounded by what GitLab ships. Jenkins's plugin model is its biggest security risk; CVEs in plugins arrive every few weeks and outdated plugins are the most common attack vector against Jenkins installations. A disciplined upgrade cadence keeps both platforms safe, but Jenkins requires more discipline to keep secure than GitLab CE.
What does the migration look like?>
Jenkins to GitLab CI is typically 6-12 weeks of part-time work for 10-20 pipelines on a mid-size team. GitLab's importer handles the basics; auto-converted pipelines need cleanup. The reverse migration (GitLab to Jenkins) is unusual and typically driven by data residency or vendor preferences. Most teams that adopt GitLab CI from Jenkins do so because they are also adopting GitLab as source-control replacement for an existing GitHub or self-hosted Git server.
Can I run GitLab Runner on Jenkins infrastructure?>
Technically yes. GitLab Runner can be installed on the same VMs that run Jenkins agents. Some teams do this during migration phases to share infrastructure across both platforms. The runners themselves are independent processes; both Jenkins and GitLab can co-exist as orchestrators against shared compute.