CircleCIAutonomous validation for the AI era
vs
Fly.ioLaunch computers for agents, code sandboxes, and your next app.
Comparison · CI/CD · weekly run Nov 3
CircleCI vs Fly.io
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
CircleCI is the stronger AI pick in CI/CD: it has a visibility score of 36.9 versus 0 for Fly.io.
Choose CircleCI if…
- You want the brand AI engines rank higher (36.9 vs 0)
- You want a lower entry price ($15 vs $38)
- You need a self-hosted or on-premises option
- You need FedRAMP Tailored (LI-SaaS) or SOC 2 Type II coverage
Choose Fly.io if…
- You need SOC 2 Type 2 or HIPAA (BAA pre-signed on HIPAA package) coverage
AI visibility side by side
Latest weekly run · Nov 3
| Metric | CircleCI | Fly.io |
|---|---|---|
| Visibility score | 36.9% | 0% |
| Change vs last week | New | New |
| Rank in CI/CD | #4 | #38 |
| Share of voice | 9% | 0% |
| Mentions this run | 54 | 0 |
| Positive in AI answers | 43% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
CircleCI 0pp · Fly.io 0pp over 0 weekly runs.
Engine by engine
CircleCI leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
CircleCIFly.io
Head to head in AI answers
0 engine answers name both brands
0CircleCI ranked higher
0Fly.io ranked higher
Features, pricing & fit
| Dimension | CircleCI | Fly.io |
|---|---|---|
| Pricing model | Usage-based | Usage-based |
| Entry price | Free; paid from $15 / mo | Free; paid from $38 / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud-hosted service with CircleCI compute and self-hosted runners, or self-managed on the customer's own infrastructure | Operated by Fly.io on its own hardware across 18+ regions worldwide, deployed from GitHub or the fly CLI. |
| Compliance | FedRAMP Tailored (LI-SaaS), SOC 2 Type II | SOC 2 Type 2, HIPAA (BAA pre-signed on HIPAA package) |
| Support | Community support forum (all plans), Ticket-based global support (Performance and Scale plans), 8x5 and 24x7 SLA options as add-ons | Community support (free), Paid Standard, Premium and Enterprise support tiers, Dedicated Slack channel on Premium and Enterprise |
| Founded | 2011 | 2017 |
| Headquarters | San Francisco, California, United States | Chicago, Illinois, United States |
| Employees | 201–500 | 51–200 |
| Funding | Series F | Seed · $136M raised |
| Best for | Engineering teams that want fast, scalable CI/CD across cloud and self-hosted infrastructure, from startups to enterprises | Developers and teams that want to ship apps, AI agents and code sandboxes without managing infrastructure. |
Plans side by side
Pros and cons
Themes from the AI answers that mention each brand
CircleCI
- fast builds and parallelism
- flexible cloud and hybrid CI/CD platform
- free tier with no credit card required
- transparent usage-based credit pricing
- rich integrations and insights
- no standard annual discount
- credit-based pricing less simple than flat rates
Fly.io
Profile in progress.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “CircleCI vs Fly.io”, https://slateindex.ai/compare/circleci-vs-fly-io, data of Nov 3, 2026. Licence: CC BY 4.0.