Head-to-head · checked November 2026
GitHub Actions vs CircleCI
If your code is on GitHub, GitHub Actions is less to run and nothing to migrate; CircleCI earns its place when you want timing-based test splitting and a wide range of executors built in. If Actions is simply too slow, a runner layer fixes that without moving.
| GitHub Actions | CircleCI | |
|---|---|---|
| Configuration | YAML workflows in .github/workflows, with reusable actions from the Marketplace and reusable workflows. | One .circleci/config.yml with jobs, workflows and reusable orbs. |
| Runners | GitHub-hosted Linux, Windows and macOS runners, larger runners on paid plans, and self-hosted runners. | Docker, Linux VM, macOS, Windows, Arm and GPU executors, plus self-hosted runners. |
| Caching | actions/cache and setup actions' caching, restored through GitHub's cache service each job. | save_cache/restore_cache keyed by checksums, workspaces between jobs, Docker layer caching. |
| Scaling and parallelism | Parallel jobs and matrix strategies; concurrency depends on plan; test splitting is yours to write. | parallelism key plus circleci tests split --split-by=timings divides a suite using stored timings. |
| Pricing model | Free on public repositories with standard runners; plan-included minutes, then per minute, for private ones. | Credits: plans include credits and each executor size spends credits per minute; a free plan exists. |
| Migration cost | None if you are on GitHub already. GitHub Actions Importer can convert CircleCI configs. | Rewrite every workflow in CircleCI's config, replace actions with orbs or scripts, move secrets to contexts. |
Where the time goes
On both, push-to-verdict time is runner wait, setup and cache restore, then the tests. CircleCI's timing-based splitting attacks the last part out of the box; on Actions you write a matrix and split the suite yourself, or use a runner layer that splits it for you.
Neither runs fewer tests per change on its own. Every push runs the whole suite your config names.
What moving costs
Going from Actions to CircleCI means a second system next to your code host: another login, another place for secrets, another config to keep in step with branch protection. Price that in hours, not only in credits.
Going from CircleCI to Actions is easier than it used to be: GitHub's Actions Importer drafts workflows from a CircleCI config, which you then review and test.
Which suits whom
Pick GitHub Actions if
- Your code, reviews and branch protection are on GitHub.
- You want one system and nothing new to sign up for.
- You are a small team and default runners are fast enough, or a runner layer makes them so.
Pick CircleCI if
- You want timing-based test splitting without building it.
- You need macOS, Windows, Arm and GPU executors from one hosted provider.
- You already run CircleCI well and moving would cost more than it saves.
Staying on GitHub Actions? Try Graphide CI
If the reason to leave GitHub Actions is the wait, try Graphide CI first: your workflows stay where they are, x64 Linux jobs run on runners with warm caches, the tests a change can reach are split across runners, and a failing test still fails the job. The switch is one pull request and undoing it is another.
How Graphide CI works · Faster GitHub Actions runners compared
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