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Cloudflare Workers vs Fly.io
Fly.io runs full-stack apps close to users but requires container management; Workers are pure functions without containers.
Cloudflare WorkersServerless code on Cloudflare's global network
Fly.ioRun full-stack apps close to your usersWhich to pick
Pick Cloudflare Workers if you want…
- Edge-native serverless functions
- Integrations with JavaScript, TypeScript or Python (on Cloudflare Workers' list, not Fly.io's)
Pick Fly.io if you want…
- Hardware-isolated edge VMs for agents
- Full-stack apps near users
- Integrations with OpenRouter, GitHub or Slack (on Fly.io's list, not Cloudflare Workers')
Side by side
- What it is
- Cloudflare Workers:Cloudflare Workers lets you run serverless functions globally on Cloudflare’s edge network in JavaScript, TypeScript, Python or Rust.
- Fly.io:Fly.io provides hardware-isolated Linux VMs (Sprites and Machines) that run close to users for AI agents and full-stack apps.
- Best for
- Cloudflare Workers:Edge-native serverless functions
- Fly.io:Hardware-isolated edge VMs for agents
- Who it’s for
- Cloudflare Workers:Developers building APIs, web apps, or edge logic who need low-latency, globally distributed compute.
- Fly.io:Developers building AI agents, personal assistants, or apps that need low-latency edge compute.
- Pricing
- Cloudflare Workers:Freemium
- Fly.io:Freemium
- Plans
- Cloudflare Workers:Free $0
- Fly.io:Machines shared-cpu-1x $0.0027 per hour · Machines performance-2x $0.0861 per hour · Sprites compute $0.07 / CPU-hour · Support Standard $29 per month · Support Premium $199 per month
- Works with
- Cloudflare Workers:JavaScript, TypeScript, Python, Rust
- Fly.io:OpenRouter, GitHub, Slack, any HTTP API
Cloudflare Workers features
- Global deployment. Deploy code to 330+ cities instantly, reducing latency for users worldwide.
- No cold starts. Functions start instantly without pre-warming, improving response times.
- Infinite concurrency. Scale automatically to handle any number of simultaneous requests.
- Pay-for-usage pricing. Only pay for CPU time and requests; no idle charges.
- Local development runtime. Test functions locally with the open-source workerd runtime before deploying.
Fly.io features
- Sprites. Sleep-aware VMs that checkpoint filesystem and services, allowing instant wake-up and rollback.
- Machines. Fast-booting, hardware-isolated VMs that scale to tens of thousands of users.
- Block Device Storage. Object-storage backed block device with automatic checkpointing and unlimited scaling.
- Connectors. Configure a credential once and share it across all Sprites with granular permissions and auto-rotation.
- Zero-Management Disk. Disk grows automatically up to 100 GB per Sprite, billed only for used bytes.
- Global Edge Network. Deploy in 18+ regions with <1 s boot time and 99.9 % SLA.
Cloudflare Workers vs Fly.io FAQ
Is Cloudflare Workers or Fly.io free?+
Cloudflare Workers has a free plan and paid plans. Fly.io has a free plan; paid plans start at $29/month (Support Standard).
Do Cloudflare Workers and Fly.io integrate with the same tools?+
Their integration lists don't overlap: Cloudflare Workers lists JavaScript, TypeScript, Python and Rust; Fly.io lists OpenRouter, GitHub, Slack and any HTTP API.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.