Fly.io is a cloud platform built for developers to deploy and run applications close to their users. It provides Fly Machines, lightweight virtual machines that can run applications from Docker images, along with managed databases, persistent storage, networking, secrets, and monitoring. Developers can use Fly Launch and the flyctl CLI to create, configure, deploy, and scale applications. Fly.io supports deployments across regions worldwide, allowing applications to run closer to users for improved latency. It supports common programming languages and frameworks and can deploy applications from Dockerfiles or existing container images. The platform is designed for developers who need more control over application infrastructure while avoiding the complexity of managing traditional servers and data centers.

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