Deno/Bun Overview — Alternatives to Node.js

Deno brings a security-first approach and native TypeScript support. Bun is an extremely fast all-in-one runtime.

Deno¶

// Native TypeScript, permissions model // deno run –allow-net server.ts Deno.serve({ port: 3000 }, (req) => { return new Response(“Hello from Deno!”); });

Bun¶

// Fastest JS runtime, npm compatible // bun run server.ts Bun.serve({ port: 3000, fetch(req) { return new Response(“Hello from Bun!”); }, });

Comparison¶

• Node.js: Largest ecosystem, most stable, slowest
• Deno: Secure by default, TypeScript native, Web Standards
• Bun: Fastest, npm compatible, all-in-one

Key Takeaway¶

Node.js for production, Bun for speed, Deno for security. The Node.js ecosystem still dominates.