Fly.io

Run full-stack apps close to users with global edge compute and instant anycast TLS.

hostingedgecontainers

Websitefly.io

CategoryHosting & deploy

PricingTrial only

Card requiredNo

← ← Back to directory Go to Fly.io ↗ ↗

ABOUT

What is Fly.io?

Fly.io provides a global platform for running Docker containers and full-stack applications across 30+ edge regions. Each deployment receives an anycast IPv4 and IPv6 address with automatic TLS termination. The platform supports any language or framework that can run inside a Docker container, with managed PostgreSQL available as a service. Fly.io offers a 7-day or 2-hour runtime free trial with no credit card required, after which billing is pay-as-you-go per second for machine runtime, storage and outbound data transfer.

BEFORE YOU SIGN UP

What you should know

✓

Global edge deployment in 30+ regionsDeploy to 30+ regions with automatic anycast routing. Traffic is served from the nearest region with zero configuration and instant TLS.

✓

Transparent pay-as-you-go pricingBilled per second for machine runtime, storage and outbound transfer. The smallest shared-cpu machine with 256 MB RAM costs about $2/month when running continuously.

△

7-day or 2-hour runtime free trialSufficient to evaluate the platform and deploy a real app. Trial machines auto-stop after 5 minutes. A credit card is required to continue after the trial.

No permanent free tierUnlike Vercel or Netlify, Fly.io does not have an ongoing free plan. After the trial, you must add a payment method and pay for what you use.

Stateful apps need careful region managementRegion data placement must be intentional for databases and volumes. Multi-region setups require understanding of replication patterns.

COMMUNITY

From the forums

Fly.io is widely respected in the developer community for its transparent pricing model and the quality of its technical documentation. Reddit discussions frequently praise its predictable pay-as-you-go billing and well-designed CLI. The main criticism is the lack of a permanent free tier: the trial is generous for evaluation but requires a credit card to continue beyond 7 days. Some users also note that managing inter-region data consistency adds complexity for stateful applications.

— Community sentiment · Reddit

💬Discuss on Reddit ↗

Alternatives to Fly.io

Appish

Freemium

Publish Docker containers in temporary slots designed for demos.

Bunny.net

Trial only

High-performance edge network with CDN, object storage and serverless compute at competitive prices.

Cloud 66

Freemium

Deploy and manage applications in your cloud without handling all server operations yourself.

ABOUT US

Honest, independent, no fluff.

No paid placements. Just a clear look at what this does, what it costs, and what to know before you commit.

FAQ

Questions, answered.

Is Fly.io free?＋

Fly.io offers a free trial lasting 7 days or 2 hours of machine runtime, whichever comes first. After the trial, a credit card is required and billing switches to pay-as-you-go. The smallest shared-cpu machine costs about $2 per month when running continuously.

Does Fly.io support WebSockets?＋

Yes. Fly.io supports WebSockets, HTTP/2 and gRPC natively through its anycast network. WebSocket connections are terminated at the nearest edge region.

How is Fly.io different from Vercel or Netlify?＋

Unlike Vercel and Netlify, which are optimized for frontend frameworks and serverless functions, Fly.io runs full Docker containers with persistent storage, making it suitable for stateful backend applications, databases and any language or runtime.