infrastructure//Fly.io

Fly.io is a cloud platform that runs backend containers in datacenters close to their users, and it serves apps that need a persistent process with low latency. It is similar to Railway but focused on edge deployment.

Fly.io is a cloud platform that runs backend containers in datacenters close to their users, and it serves apps that need a persistent process with low latency. It is similar to Railway but focused on edge deployment.

It runs persistent processes, Docker containers or VMs, rather than serverless functions.

It is multi-region: an app is deployed once and runs in multiple PoPs. That puts it closer to edge computing than Railway, with full server capabilities.

It suits real-time apps, game servers, databases and anything that needs a persistent process close to users. It is less opinionated than Vercel and more flexible in infrastructure than Railway.