Fly.io

Overview Fly.io is a cloud computing platform built for developers who want to ship code quickly without worrying about infrastructure complexity. It uses hardware-virtualized containers called Machines that launch instantly and run only when needed, charging for actual CPU and memory consumption down to the second. The platform provides isolated sandboxes called Sprites for running AI-generated code in complete safety, along with built-in private networking, global object storage, and fast local NVMe storage. It serves teams shipping web applications, distributed systems, and AI agents that need compute across 18 global regions with sub-100ms response times. Key Benefits Launch hardware-virtualized containers in under a second and pay only for actual CPU and memory consumption down to the second. Deploy in 18 regions from Sydney to São Paulo for sub-100ms response times that give users a native-app feel. Run every agent instance on its own VM with dedicated CPU, memory, networking, and a private filesystem — no shared runtimes or noisy neighbors. Checkpoint entire sandbox environments, run anything inside them, and restore if something breaks without losing state. Trusted by teams at Supabase, Tailscale, Tigris, Upstash, Turso, Mailgun, Fanatics, SavvyCal, Acast, and Glide. How It Works You deploy your code using the Fly CLI, which generates containers for popular frameworks including Rails, Phoenix, Django, Node, Laravel, and .NET — no Dockerfile required. Those containers launch as hardware-isolated Machines that start fast enough to handle HTTP requests and scale into tens of thousands of instances automatically. You manage everything through the FlyCTL CLI with unlimited users per organization, aggregated billing, private networking, and SSO authentication built in. Use Cases Web application teams deploying Ruby on Rails, Phoenix, Django, Node, Laravel, or .NET apps with zero-downtime deploys and automatic scaling. AI agent builders running every agent instance on its own VM with persistent brains for long-running tasks and ephemeral workers for burst workloads. Distributed systems engineers running clustered databases like CockroachDB, globally-distributed Postgres, and Elixir FLAME without Terraform configuration. Platform teams needing hardware-isolated sandboxes for running untrusted AI-generated code with checkpoint-and-restore capabilities. Startups and enterprises requiring HIPAA-compliant workloads with BAAs and SOC2 attestation for $99/month. Why Choose This Product Fly.io is best suited for developers and teams who want to ship code without managing infrastructure complexity, particularly those running web applications, distributed databases, or AI agents that benefit from global deployment. The platform uses a usage-based billing model with no fixed plans, and offers enterprise features including SSO, SOC2 Type 2 attestation, and guaranteed support response times for paid support customers. Businesses needing HIPAA compliance can add a BAA and SOC2 coverage for $99/month.