Comparison
Actions or GitLab CI? Start from where the code already lives
The verdict
If your repositories are on GitHub, use GitHub Actions and stop researching. The marketplace has roughly 20,000 prebuilt actions, hosted Linux minutes are the cheapest of any major provider, and nothing else integrates with pull requests as tightly. Choose GitLab CI when you want one product to hold source control, CI, a container registry, and security scanning without stitching four vendors together, or when you must run the whole platform on your own hardware. The tiebreaker is not YAML syntax or throughput - both are fine - it is whether you are buying a CI tool or an entire DevOps platform.
Survey data through 2026 puts GitHub Actions around 33 percent organisational adoption, Jenkins at roughly 28 percent, and GitLab CI near 19 percent. That gap is mostly a proxy for where code is hosted, not a quality judgement. Both tools run containerised jobs against a YAML graph, both support self-hosted runners, and both issue short-lived OIDC tokens so a pipeline can deploy to AWS or Cloudflare without a stored secret.
GitHub Actions vs GitLab CI on the dimensions that decide it
Pricing figures below are list rates for hosted Linux runners as of August 2026. Verify against your own plan before you build a business case on them.
| Dimension | GitHub Actions | GitLab CI |
|---|---|---|
| Free tier | Unlimited for public repositories. 2,000 Linux minutes a month on Free for private repos, 3,000 on Team. | 400 compute minutes a month on Free. Premium includes 10,000 per namespace. |
| Cost at real usage | About $0.006 per Linux minute after the cut in January 2026, but Windows is roughly $0.010 and macOS around $0.062. | About $0.010 per minute with no operating system multiplier, so mixed-OS and macOS-heavy builds can land cheaper here. |
| Self-hosted runners | Free to register. A per-minute platform fee was announced for 2026 and then shelved after community pushback. | Unlimited runners on every tier including Free, with no per-minute charge. You pay only for the compute. |
| Ecosystem | Around 20,000 marketplace actions. Almost every vendor ships an official one, so most integrations are three lines. | No marketplace of equivalent size. You write shell, or include a maintained CI template. |
| Batteries included | CI plus Packages, Dependabot, code scanning, and Environments. Some pieces are separately priced. | Container and package registries, SAST and DAST, dependency scanning, review apps, and release management in one product. |
| YAML ergonomics | Reusable workflows, composite actions, and matrices. Conditionals live in expression strings that are hard to test locally. | YAML anchors, extends, include, rules, and parent-child pipelines. More composable, slightly more to learn. |
| Self-managed install | Only through GitHub Enterprise Server, which is an enterprise sales conversation. | A free self-managed Community Edition you can run on one VM. This is GitLab's strongest structural advantage. |
| Exit cost | Higher than it looks. Every uses: line is a GitHub-specific dependency you must reimplement elsewhere. | Lower. Most jobs are shell commands in a container image, which port to any runner with modest edits. |
When each one is the right call
Choose GitHub Actions when
- Your code is already on GitHub. Moving repositories to get a different CI tool is almost never worth it.
- You maintain open source. Public repositories get unlimited hosted minutes, which no competitor matches.
- You want an integration to take minutes rather than an afternoon, because someone already published the action.
- Your builds are overwhelmingly Linux, where the per-minute rate is the lowest in the market.
- You lean on pull request checks, required status checks, and merge queues as the actual release gate.
- You want AI review tools and deployment platforms to work on day one, since they all target GitHub first.
Choose GitLab CI when
- Everything must run on infrastructure you control. Self-managed GitLab is free and genuinely complete, which GitHub cannot match without an Enterprise Server contract.
- Your builds are Windows or macOS heavy. Flat per-minute pricing beats GitHub's 10x macOS multiplier outright.
- You want security scanning, a container registry, and release management without procuring three more products.
- Compliance requires an audit trail across code, pipeline, and artefact in one system with one permission model.
- Your pipelines are large enough that extends and include across repositories beat copy-pasted workflow files.
- You value portability: shell-in-a-container jobs are much easier to lift onto another runner later.
What actually changes the bill
Per-minute rates get quoted constantly and decide almost nothing. What decides a CI bill is how many minutes you burn, and that is a function of caching, concurrency, and how often you run the full suite. A team paying four figures a month for hosted runners is usually reinstalling dependencies on every job, running the entire test suite on every push to every branch, and never cancelling superseded runs. Fix those three things and both platforms get cheap.
The second-order costs are where the platforms genuinely differ. GitHub charges by operating system multiplier, so a macOS build for an iOS app costs roughly ten times a Linux minute. GitLab charges one flat rate regardless. If you build native Apple targets on every merge, that single line can invert the comparison. Conversely, GitHub's free allowance for public repositories is unlimited, which is why practically every open source project of any size runs Actions.
GitHub also spent early 2026 demonstrating why self-hosted runners deserve a plan. A per-minute platform fee on self-hosted runners was announced, met with substantial community objection, and shelved before it took effect. Nothing was charged, but the episode is a reasonable prompt to make sure your runner setup is not so entangled with one vendor's control plane that a pricing change becomes an emergency. GitLab's position here is structurally stronger: unlimited free self-hosted runners on every tier, including Free.
On ergonomics, the honest summary is that GitHub Actions is easier to start and harder to keep clean, while GitLab CI is the reverse. A first Actions workflow is four lines because someone else wrote the action. A hundredth Actions workflow is a maintenance problem, because those uses: references are third-party code running with access to your build, each pinned to a tag you now have to audit. GitLab makes you write more shell up front and then hands you real composition primitives, so a fifty-project group can share one templated pipeline.
Neither tool is a reason to move your source control. If you are on GitHub, the migration cost to GitLab exceeds any pricing delta for almost every team under a hundred engineers. If you are already on self-managed GitLab, adopting Actions would mean adopting GitHub, which is a much larger decision than picking a CI runner. Official documentation: docs.github.com/actions and docs.gitlab.com/ee/ci.
Where this fits in a delivery pipeline
If the verdict pushed you to Actions, the GitHub Actions cheatsheet covers triggers, matrix builds, caching, and reusable workflows, and the CI/CD pipeline guide walks the whole lint, test, build, preview, release loop end to end.
Still weighing the field? The CI/CD tools roundup adds CircleCI, Buildkite, Dagger, and Jenkins to the picture. For what the pipeline deploys onto, see the hosting platform directory and the container tooling guide.