Fly.io
Deploy Docker containers to servers around the world with a single command
Fly.io takes your Docker container and runs it on servers around the world. Your app in Tokyo, Sao Paulo, and Amsterdam simultaneously — not behind a CDN, but actually running there. For apps where latency matters (real-time features, APIs, databases), this is the real deal.
The free tier gives you 3 shared VMs with 256MB RAM each, which can run a small app and a Postgres database. Beyond that, pricing is usage-based starting at $1.94/month for a shared-cpu VM. The tradeoff versus Railway or Render is complexity: Fly gives you more control over where your code runs, but you need to understand containers, config files, and networking basics. If you just want to push code and forget about it, Railway is easier. If you want your API to respond in under 50ms for users worldwide, Fly.io is worth the setup.
What's good
- Run your app in 30+ regions close to users — real global distribution, not just CDN caching
- Free tier includes 3 shared-cpu VMs with 256MB RAM each — enough for small apps
- Built-in Postgres, Redis, and object storage so you can run a full stack
Watch out for
- Steeper learning curve than Railway or Render — you need to understand Dockerfiles and fly.toml config
- Billing can be unpredictable — outbound bandwidth costs and machine scaling add up
- Support response times on free tier are slow — community forum only