Fly.io
Run full-stack apps in fast-booting VMs close to your users
Fly.io runs applications packaged as Docker images in fast-booting Firecracker micro-VMs across regions worldwide, so code can run close to users. It is driven by the flyctl command-line tool and a Machines API, with persistent volumes, private networking and managed Postgres. It suits teams that want more control over placement and infrastructure than a classic platform as a service, with pay-as-you-go pricing.
- features
- 3
- alternatives
- 9
- platform
- 1
- Updated
- Oct 12, 2026
Features
Our take
Pros
- Runs apps close to users across many regions worldwide
- Fast-booting Firecracker micro-VMs built from standard Docker images
- Fine-grained control through flyctl and the Machines API
Cons
- No free tier, and usage-based pricing can be hard to predict
- More infrastructure concepts to learn than a classic platform as a service
Editorial assessment by the Alternatives.tools team, based on what the product is known for. Not a user review.
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