Fly.io

Fly.io operates a cloud infrastructure platform for running applications and, increasingly, AI agent workloads on hardware-isolated virtual machines. Its long-standing product, Fly Machines, converts containers into micro-VMs that boot in under a second, run in multiple regions close to users, and can scale out to tens of thousands of instances; the platform is driven by the flyctl command-line tool and supports any workload that can be packaged in a container, alongside persistent volumes, private networking, anycast edge routing, managed Postgres, logs, metrics and TLS certificate provisioning.

The company's current primary focus is "computers for agents." Its Sprites product provides semi-disposable but persistent Linux environments in which an agent gets its own hardware-isolated box that checkpoints itself automatically, sleeps when idle and wakes with its filesystem, running services and installed dependencies intact, with rollback to earlier checkpoints. A Sprite Block Device (in private beta as of the site's description) backs disks with object storage, growing to as much as 100 GB per Sprite with billing based on bytes written, and supports forking or cloning drive templates. Sprites Connectors act as an API gateway holding credentials so that Sprites can reach services such as OpenRouter, GitHub, Slack or arbitrary HTTP APIs without tokens being placed on the machine, with per-Sprite, per-label or per-endpoint permissions and centralized key rotation. Stated use cases include coding agents and harnesses, personal assistant agents, per-tenant MCP servers, execution of untrusted code, and hosting agent-built applications, each of which receives an HTTPS URL.

Fly.io runs its own hardware in colocation facilities rather than reselling hyperscaler capacity, an approach it describes as an economics and margin decision. The company reports 18+ regions on its site, having launched with 19 regions and cited 33 regions in a 2023 blog post; its public status page lists regional availability across North America, Europe, South America, Asia, Africa and Australia.