Serverless computing has officially moved to the edge — literally. Developers today are spoiled for choice with edge-first platforms like Deno Deploy, Cloudflare Workers, and Vercel Edge Functions. But which one should you bet on in 2025?
I decided to stop theorizing and run a hands-on comparison. I tested cold starts, looked at use-case fit, compared DX (developer experience), and even built the same app across all three.
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TL;DR
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1. The Test Setup
I deployed the same TypeScript-based Hello World API:
export default (req: Request): Response => { return new Response("Hello from the Edge!"); };
Tested cold starts over 10 requests from Bangalore, New York, and Frankfurt using k6:
k6 run --vus 1 --iterations 10 edge-test.js
And I captured p95 latency + cold start time from logs and headers.
