Fly.io Machines
Run your full stack apps (and databases!) all over the world. No ops required.
Overview
While not strictly a 'functions' platform, Fly.io allows developers to run application code at the edge. It uses Firecracker micro-VMs to launch 'Machines' in regions all over the world. This allows you to deploy full-stack applications, not just functions, that run with low latency for global users. It's edge computing for applications, not just event handlers.
✨ Key Features
- Deploy full applications, not just functions
- Run Docker containers
- Firecracker micro-VMs for fast starts and security
- Global network of regions
- Automatic scaling (including to zero)
- Managed Postgres databases
🎯 Key Differentiators
- Runs full applications and stateful services, not just functions
- Uses lightweight Firecracker VMs instead of isolates or containers
- Excellent developer experience with `flyctl` CLI
Unique Value: The easiest way to deploy and scale full-stack applications and databases globally, bringing your entire app, not just a function, closer to your users.
🎯 Use Cases (4)
✅ Best For
- Deploying a Ruby on Rails application globally
- Hosting a multi-region Phoenix/Elixir application
- Running a Node.js API server close to users
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Simple, single-event functions (might be overkill)
- Users looking for a pure FaaS/serverless function experience
🏆 Alternatives
Unlike FaaS platforms that only run stateless functions, Fly.io can run entire applications, including databases. It's simpler than managing VMs on AWS/GCP.
💻 Platforms
🔌 Integrations
🛟 Support Options
- ✓ Email Support
- ✓ Dedicated Support (Enterprise tier)
🔒 Compliance & Security
💰 Pricing
Free tier: Up to 3 shared-cpu-1x 256MB VMs, 3GB persistent volume storage, 160GB outbound data transfer.
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