Cloudflare Workers vs Fly.io
Pricing
Cloudflare Workers: Free tier (100,000 requests/day), paid from $5/mo
Fly.io: Free tier (3 shared VMs), usage-based from $1.94/mo per VM
Description
Cloudflare Workers: Serverless platform for running JavaScript, TypeScript, Python or Rust code and full-stack apps on Cloudflare's global network
Fly.io: Deploy Docker containers to servers around the world with a single command
Pros
- The free plan includes 100,000 requests a day, and requests to static assets are free and unlimited
- The paid plan starts at $5/month with 10 million requests and 30 million CPU milliseconds included
- No cold starts, and you pay for CPU time, not for time spent waiting on network calls
- Run your app in 30+ regions close to users: real global distribution, not just CDN caching
- Free tier includes 3 shared-cpu VMs with 256MB RAM each, enough for small apps
- Built-in Postgres, Redis, and object storage so you can run a full stack
Cons
- Only a subset of Node.js APIs is supported, so some npm packages won't run
- The free plan allows 10 ms of CPU time per request
- Steeper learning curve than Railway or Render: you need to understand Dockerfiles and fly.toml config
- Billing can be unpredictable: outbound bandwidth costs and machine scaling add up
- Support response times on free tier are slow: community forum only
Details
Workers runs your code in Cloudflare’s data centres in more than 330 cities, close to your users. It handles APIs, full-stack apps built with React, Vue or Next.js, scheduled jobs and webhooks, and it connects to Cloudflare’s databases, storage and queues through bindings.
Cloudflare’s documentation for Pages now says to start new projects on Workers, and calls Workers its primary platform for building applications.
The paid plan is $5 a month plus any usage beyond the included amounts, and requests for static files are never charged. Check that your dependencies run on the Workers runtime before you commit, since it is not a full Node.js environment.
Fly.io takes your Docker container and runs it on servers around the world. Your app in Tokyo, Sao Paulo, and Amsterdam simultaneously, not behind a CDN, but actually running there. For apps where latency matters (real-time features, APIs, databases), this is the real deal.
The free tier gives you 3 shared VMs with 256MB RAM each, which can run a small app and a Postgres database. Beyond that, pricing is usage-based starting at $1.94/month for a shared-cpu VM. The tradeoff versus Railway or Render is complexity: Fly gives you more control over where your code runs, but you need to understand containers, config files, and networking basics. If you just want to push code and forget about it, Railway is easier. If you want your API to respond in under 50ms for users worldwide, Fly.io is worth the setup.
Cloudflare Workers verified
Fly.io verified
