What is Fly.io used for?

Fly.io is a cloud platform that runs containers as hardware-isolated micro VMs close to users, plus persistent environments for AI agents and managed Postgres. It is a good fit for running apps close to users in several regions, giving AI agents a persistent computer and scaling container workloads on demand.

How much does Fly.io cost?

Paid plans for Fly.io start at $38 per month, and there is no free plan.

Is Fly.io open source?

No. Fly.io is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Fly.io include Coolify, Dokploy and Dokku.

What are some alternatives to Fly.io?

Fly.io competes with Render, Railway and Heroku. For open-source options, see Enlisted's ranked list of open-source Fly.io alternatives.

Fly.io: features, pricing and alternatives

About Fly.io

Fly.io is a commercial cloud platform that turns container images into Fly Machines, which are hardware-isolated virtual machines that boot in under a second and run in data centers near users. It is aimed at developers who want to deploy applications across multiple regions without operating their own infrastructure.

The current lineup centers on Machines, Sprites and Managed Postgres. Sprites are persistent computers for AI agents that sleep when idle, wake with their filesystem and running services intact, and support checkpoints and fast rollback. Platform features include private networking, autoscaling, zero-downtime deploys, granular routing and monitoring.

Fly.io is a proprietary hosted service with documentation, a community forum and a pricing page for current rates. It suits teams that want regional deployment close to end users or a place to run the apps and agents they build.

Key features

Hardware-isolated micro VMs that boot in under a second
Deployment across regional data centers
Sprites: persistent environments for AI agents
Managed Postgres databases
Private networking and granular routing
Autoscaling and zero-downtime deploys

Good fit for

→Running apps close to users in several regions
→Giving AI agents a persistent computer
→Scaling container workloads on demand

Tags: paas; containers; micro-vms; edge; postgres; ai-agents; cloud

Fly.io: questions and answers

What is Fly.io used for?: Fly.io is a cloud platform that runs containers as hardware-isolated micro VMs close to users, plus persistent environments for AI agents and managed Postgres. It is a good fit for running apps close to users in several regions, giving AI agents a persistent computer and scaling container workloads on demand.
How much does Fly.io cost?: Paid plans for Fly.io start at $38 per month, and there is no free plan.
Is Fly.io open source?: No. Fly.io is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Fly.io include Coolify, Dokploy and Dokku.
What are some alternatives to Fly.io?: Fly.io competes with Render, Railway and Heroku. For open-source options, see Enlisted's ranked list of open-source Fly.io alternatives.