Fly.io developer documentation

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Machines are fast-launching VMs—and the engine of the Fly.io platform.

They’re also a low-level interface to deploy and scale out your application with precise control.

Fly Launch is configuration, provisioning, deployment, scaling, and orchestration with flyctl, built on Fly Machines.

Run GPU workloads on Fly Machines.

All languages and frameworks can run on Fly.io. We have more extensive docs and support for the following:

See the whole list:

Add-on services to help you run your entire stack near your users.

Private networking, public services, routing, and load balancing.

Explore built-in and custom Prometheus metrics and Grafana dashboards. Live tail and search your app’s logs, or ship them where you want them.

Set up DNS and SSL certs for your app at your own domain.

Set up continuous deployment from GitHub.