About Fly.io
Fly.io is a cloud platform that runs applications in lightweight micro-VMs (Firecracker) at edge locations around the world. It excels at running full-stack apps close to users with built-in global distribution, making it ideal for latency-sensitive applications, real-time apps, and global deployments.
Key Features
- Global edge deployment (35+ regions)
- Firecracker micro-VMs
- Built-in PostgreSQL (Fly Postgres)
- GPU machines for AI workloads
- Anycast networking
- Persistent volumes
- Auto-scaling
- CLI-first developer experience
Pros
- Deploy anywhere in the world — low-latency by default
- Runs real full-stack apps (not just serverless functions)
- Great for real-time apps, multiplayer, and global services
- Competitive pricing for global distribution
Cons
- Steeper learning curve than Railway or Render
- Managed database (Fly Postgres) is less mature than dedicated services
- Smaller ecosystem and community
Integrations
GitHub ActionsDockerPostgreSQLRedisTigris (S3)Sentry
Best Use Cases
- Globally distributed applications
- Real-time and multiplayer backends
- Edge-deployed full-stack apps
- AI inference at the edge
Fly.io Alternatives
Looking for alternatives to Fly.io? See all Fly.io alternatives →
Quick Info
- Website
- fly.io
- Founded
- 2017
- Company
- 50-100
- Pricing
- freemium
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