Quick Comparison
| Cloudflare Workers | Vercel Edge Functions | |
|---|---|---|
| Runtime | V8 isolates | V8 isolates (Edge Runtime) |
| Cold start | ~0ms | ~0ms |
| Free tier | 100K requests/day | 100K executions/month |
| Storage | KV, R2, D1, Durable Objects | Vercel KV, Blob, Postgres |
| Framework | Any (Hono, itty-router) | Next.js, SvelteKit |
When to Use Cloudflare Workers
- Framework-agnostic edge apps
- You need Durable Objects (stateful edge)
- You want the largest edge network
- You’re building APIs or middleware
When to Use Vercel Edge Functions
- Next.js or SvelteKit apps on Vercel
- You want seamless integration with Vercel’s platform
- Middleware and API routes in your framework
Verdict
Cloudflare Workers for standalone edge apps and APIs. Vercel Edge Functions if you’re already on Vercel with Next.js.