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Alex Spinov
Alex Spinov

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Fly.io Has a Free Application Platform — Deploy Docker Apps to Edge Locations Worldwide

Fly.io is an application platform that runs Docker containers on servers around the world — your app runs close to your users.

What You Get for Free (Free Tier)

  • 3 shared VMs — enough for small apps
  • 256MB RAM — per VM
  • 3GB storage — persistent volumes
  • 160GB bandwidth — outbound transfer
  • Automatic SSL — HTTPS on custom domains
  • Global deployment — 35+ regions worldwide
  • Fly Machines — fast-booting VMs (300ms cold start)
  • Private networking — WireGuard mesh between apps
  • Fly Postgres — managed PostgreSQL

Quick Start

brew install flyctl
fly auth signup
fly launch  # detects your app, creates Dockerfile if needed
fly deploy   # deploys globally
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# fly.toml
[build]
  dockerfile = "Dockerfile"

[http_service]
  internal_port = 3000
  force_https = true

[[vm]]
  memory = "256mb"
  cpu_kind = "shared"
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Why Developers Switch from Vercel/Railway

Vercel is for Next.js only, Railway's free tier is limited:

  • Any Docker app — not locked to one framework
  • Edge deployment — run in 35+ regions, not just US
  • Persistent storage — volumes for databases, uploads
  • SSH accessfly ssh console for debugging

A real-time game server on Railway had 200ms latency for EU users (US-only servers). After Fly.io: same app running in 5 regions, <30ms latency worldwide.

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