Fly.io Bets the Company on Sprites, Cloud Computers Built for AI Agents

Fly.io founder Kurt Mackey uses this post to reset the company’s direction after a public jolt: developer influencer Theo Browne, while praising the platform, named Fly.io the provider he was least sure would survive the year. Mackey pushes back with financials — he says the company is coming off the strongest months in its history — but concedes it had drifted into an unresolved identity crisis. His response is a package of moves: a fresh funding round, the promotion of Scott Johnston to CEO, and a decision to reorient the whole company around Sprites.

Sprites are Fly.io’s pitch for what AI coding agents actually need from the cloud. Mackey argues the platform’s original selling points — edge deployment for speed and AWS-grade power with Heroku-grade ergonomics — matter far less now that agents, not humans, drive most deployments and an agent can just as easily one-shot an AWS setup. His bet is that AI will make nearly everyone a programmer the way spreadsheets did, so the future is disposable, personalized software rather than fixed apps served to millions. Sprites are built for that: what he calls ‘semi-disposable’ machines that spin up by the thousands, each with a 100GB durable disk, metered billing that stops when idle, and the ability to host and share an app over the internet. The framing is that agents don’t want sandboxes, they want real computers.

The relaunch, which Mackey calls ‘nu-Sprites,’ graduates the project from a skunkworks effort — one not even hosted on the main Fly.io site — into the company’s core focus. Two new subsystems get it to what he considers feature-complete, starting with the Sprite Block Device (SBD), a proper storage layer replacing an improvised stack cobbled together from JuiceFS and Litestream. Fly Machines and the existing platform-as-a-service offerings are staying, but the company’s forward bet is now squarely on computers for agents.