Fly.io runs your apps in micro VMs on servers close to your users — in 30+ regions around the world. Developers love Fly for its CLI simplicity, global networking, and transparent pricing that makes Heroku-level DX affordable at scale.
Strengths
Limitations
Coding agent developers
Give each agent its own Linux box that checkpoints itself so harnesses like Claude and Codex find everything where they left it.
Personal agent builders
Run inbox- and calendar-connected agents like Hermes, Pi, or Openclaw on a Sprite that sleeps until needed instead of on a laptop.
MCP server operators
Run every MCP server in its own Sprite with persistent disk and egress policy, paying only for the tool calls used.
Fly.io offers a free plan, with paid plans starting at Free tier.
Yes, Fly.io provides an API for developers.
Fly.io is available on Web, CLI.
Fly.io integrates with OpenRouter, GitHub, Slack.
Fly.io is offered as a cloud-based (SaaS) deployment.
Sprite Block Device is currently in private beta (early access only)
Fly.io is best suited for Coding agent developers, Personal agent builders, MCP server operators.
Common uses for Fly.io include coding agents, personal agents, mcp servers, running untrusted code.
Razorpay is the closest alternative to Fly.io, followed by GitHub and Vercel.
Fly.io and Razorpay are both used for developer tools -- specifically dev infrastructure tools. See the full side-by-side comparison for pricing and feature differences.
Fly.io's published pricing · verified Sep 11, 2026
Free tier
See what people actually pay for Fly.io
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