CircleCI vs Fly.io
CircleCI confirms 3 of the features we check on its own site; Fly.io confirms 5. Starting prices: CircleCI not published, Fly.io USD 2/mo · per Machine.
CircleCI
Engineering teams automating build, test and release pipelines.
Watch out: No price figures in the crawled text.
Fly.io
Developers running apps and AI agents on hardware-isolated VMs close to users.
Watch out: Support is paid by tier; standard first response is 36 hours.
| Overview & pricing | ||
|---|---|---|
| Category | Developer Tools & APIs | Developer Tools & APIs |
| Specialty | CI/CD automation | Cloud runtime |
| Based in | 🇺🇸 United States | 🇺🇸 United States |
| Best for | All sizes | All sizes |
| Starting price | Unconfirmed | USD 2/mo · per Machine |
| Free plan | ✓Yes | Unconfirmed |
| Free trial | Unconfirmed | Unconfirmed |
| Features confirmed on each vendor’s site | ||
| Free tier for developers · Core features | ✓Start building on CircleCI for free | ✓Start for free, pay as you grow |
| CI/CD integration · Core features | ✓Validate, test and ship every change; continuous integration | Unconfirmed |
| Monitoring / logs · Core features | Unconfirmed | ✓Monitoring listed as a feature |
| Choice of data regions · Core features | Unconfirmed | ✓Machines available in many regions |
| Usage-based billing · Core features | Unconfirmed | ✓Compute billed by the second |
| Public documentation · Core features | ✓Documentation linked in product menu | ✓Platform Docs linked |
| Integrations | ||
| Listed on its site | GitHub, GitLab, Bitbucket, AWS, GCP, Kubernetes | Unconfirmed |
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Every ✓ / ✕ comes from the vendor’s own website (sources on each product page). Unconfirmed means the site doesn’t say — not that the feature is missing.