GitHub Actions vs GitLab CI: A Fair 2026 Comparison
Both are first-party CI built into the host platform. The real choice usually follows where your code already lives.
GitHub Actions and GitLab CI are the two dominant integrated CI/CD platforms. Both define pipelines in YAML, run on hosted or self-hosted runners, and ship a large marketplace or template ecosystem. Here is an honest, side-by-side look.
| GitHub Actions | GitLab CI | |
|---|---|---|
| Config | .github/workflows/*.yml (jobs + reusable actions) | .gitlab-ci.yml (stages + jobs, includes) |
| Hosting model | GitHub-hosted or self-hosted runners | GitLab.com SaaS or self-managed runners |
| Pricing | Per-minute, premium on hosted runners | Per-minute compute units, free self-managed |
| Ecosystem | Huge Actions Marketplace | CI/CD Catalog + built-in templates |
| Speed levers | Caching, larger runners, managed runners | Caching, fast self-managed runners |
| Self-hosting | Actions runner / ARC on Kubernetes | GitLab Runner (mature, flexible) |
Pricing and cost
Both bill hosted minutes at a premium and both let you self-host to cut compute cost. GitLab leans on self-managed runners for cheap scale; GitHub teams hit the same economics with self-hosted or managed runners. Verify current per-minute and compute-unit rates on each vendor site.
Config and ecosystem
Actions composes reusable third-party Actions from a large marketplace; GitLab favors a tighter built-in feature set (environments, review apps, security scanning) plus a CI/CD Catalog. Teams already on GitHub get the deepest integration with Actions.
Speed and self-hosting
On both, the biggest wall-clock wins come from caching and faster runners, not the platform itself. If you stay on GitHub Actions, managed runners (e.g. Latchkey) cut per-minute cost from $0.006 to $0.0025 at 2 vCPU, add warm pools so jobs do not queue, and self-heal transient failures automatically.
Migrating between CI platforms: what actually costs time
- Pipeline syntax is the easy part and the part every comparison focuses on. Budget for it, then expect it to be the smallest line item.
- Secrets, OIDC trust relationships, and deploy credentials have to be recreated and re-approved, usually by a different team.
- Caching semantics differ enough that a naive port produces a pipeline that is correct and much slower.
- Required status checks and branch protection reference check names. Renaming them mid-migration blocks merges until the rules are updated.
- Run both in parallel on the same commits until the new one has been green for a full sprint. Cutting over on a green first run is how migrations get rolled back.
The verdict
Pick the CI that matches where your code lives: GitHub Actions for GitHub repos, GitLab CI for GitLab. If you are on GitHub Actions and feel cost or flakiness, swap GitHub-hosted runners for managed runners before switching platforms.