Fly.io
Deploy Docker containers globally at the edge with fast-launching microVMs
Fly.io is a developer-centric cloud platform that runs containerised applications across 30+ global regions using Firecracker microVMs, placing apps close to end users to reduce latency. The platform offers Docker-native deployment via its CLI tool (flyctl), supporting multi-region orchestration, persistent volumes, and managed Postgres. It's positioned as a modern alternative to Heroku for developers requiring global reach and lower-level infrastructure control without the complexity of Kubernetes.
How we scored it
Six-factor weighted score. Each dimension scored 0–10 by our editorial team across testing periods of 3–18 months. No vendor influence.
What it actually costs
Intro pricing shown — see the renewal note for what you'll pay after the introductory term. We don't hide the second-act price.
The real cost
What you'll actually pay across 4 years, including the renewal cliff. We blend the math so you see the true monthly cost.
When the bill actually arrives
Most hosts advertise intro pricing prominently and renewal pricing in the fine print. Here\'s the trajectory drawn to scale.
Fly.io against the field
The highest-scoring alternatives in the same category, compared on the figures we hold for all of them.
| Fly.ioThis page | Supabase | GitHub | |
|---|---|---|---|
| ReviewCost score | 7.8/10 | 8.7/10 | 8.7/10 |
| Cheapest plan | Pay-as-You-Go (Free Tier) | — | — |
| From | — | — | — |
| Renews at | Not published | Not published | Not published |
| Biggest strength | Global edge deployment with 30+ regions, placing apps physically close to users for consistently low latency | Postgres foundation means you're not locked into a proprietary database — you can self-host or migrate if needed | GitHub Copilot demonstrably accelerates development — customers like Duolingo report 25% speed gains and Mercado Libre cuts coding time by 50% |
| Biggest drawback | Free tier removed for new accounts (only legacy users retain 3 free shared-CPU VMs); all new signups face pay-as-you-go from day one | Dashboard can be overwhelming for developers new to Postgres — the SQL editor and migration tools assume some database literacy | Pricing can become punitive at scale — enterprise features and Copilot seats add up quickly for larger teams, making alternatives like GitLab worth evaluating |
Prices are the published figures at the time of writing and change often. Renewal pricing is shown where the vendor publishes it. See how we review.
What people ask about Fly.io
Straight answers to what buyers actually ask, drawn from the documentation and published user reports.