Deploy app servers close to your users around the world
Run any Docker container globally close to users with Anycast routing — true multi-region with just a fly.toml config file
Persistent volumes and long-running processes make it suitable for stateful apps that serverless platforms can't handle
Machines API lets you spin up ephemeral containers programmatically — great for running user-submitted code safely
The free allowance is enough to run two small apps indefinitely, which is great for hobby projects and side businesses
The CLI-first experience has a steep learning curve compared to Vercel or Railway — the mental model of machines and apps takes time to internalize
Networking between services, volumes, and private networking can behave unexpectedly and debugging requires deep platform knowledge
Documentation quality is inconsistent — some features are covered well but others have sparse or outdated guides
Cold starts when a machine scales from zero are longer than serverless alternatives at around 2-5 seconds
No recent threads in the last 30 days. We pull discussions weekly — check back soon.
Compare Fly.io pricing
See real costs vs alternatives with the cost calculator
Cloudflare Workers
Deploy serverless code at the edge globally
