AI tool comparison
Cloudflare Workers vs Fly.io
Which one should you ship with? Here is the side-by-side panel verdict, pricing read, reviewer split, and community vote comparison.
Infrastructure
Cloudflare Workers
Edge computing at 300+ locations worldwide
100%
Panel ship
—
Community
Free
Entry
Cloudflare Workers runs JavaScript/WASM at the edge in 300+ locations. Features include Workers AI for inference, D1 (SQLite at the edge), R2 (S3-compatible storage), and KV (key-value store). The edge computing platform.
Infrastructure
Fly.io
Deploy app servers close to your users globally
100%
Panel ship
—
Community
Free
Entry
Fly.io runs your app servers in data centers around the world, close to your users. Supports any Docker container, persistent storage, and GPU workloads. Popular for deploying full-stack apps and AI inference.
Reviewer scorecard
“The free tier is absurdly generous and the cold starts are essentially zero. For APIs, middleware, and edge logic, nothing else gives you this performance at this price.”
“For apps that need full server control — WebSocket servers, background workers, AI inference — Fly.io gives you the flexibility that serverless platforms don't.”
“The Worker runtime has limitations — no Node.js stdlib, size limits, CPU time limits. Know the constraints. But for what it does well, it's unbeatable.”
“The DX has improved massively but it's still more complex than Vercel. You need to understand Docker and infrastructure. Not for beginners.”
“Cloudflare is building the programmable internet. Workers + D1 + R2 + AI = a complete platform that runs at the edge. They're quietly becoming the default infrastructure layer.”
“Fly.io is the answer for workloads that don't fit the serverless model. As AI inference goes local-first, having servers in 30+ regions matters.”
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