Fly.io

Run full-stack apps as lightweight Firecracker VMs in 35+ regions worldwide — deploy by pushing a Dockerfile.

Starter

Pricing Tier

Medium

Learning Curve

1–3 days for first deploy

Implementation

small, medium, large

Best For

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✓ Use when

Teams needing multi-region latency without managing Kubernetes, or startups running AI inference on flexible GPUs.

✗ Avoid when

Mission-critical databases without tolerance for occasional hardware reshuffles — Fly Postgres is unmanaged and requires engineering ownership.

What is Fly.io?

Fly.io runs your app as a Firecracker micro-VM close to your users using Anycast routing. The deployment unit is any Docker image, so existing apps port over easily. Developers like it for globally distributed Postgres (Fly Postgres), region-aware routing, and a refined CLI. Fly made a major pivot in 2024 toward GPU workloads and machine-scheduled workloads for AI inference.

Key features

✓Firecracker micro-VMs in 35+ regions

✓Anycast global routing

✓Fly Machines API for on-demand compute

✓Managed Postgres with replicas

✓GPU-backed machines for AI inference

Integrations

GitHubSentryUpstash Redis

💰 Real-world pricing

What people actually pay

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