Node.js vs Deno vs Bun 2026: Which JavaScript Runtime to Use?

JavaScript runtime wars continue in 2026. Node.js 22 dominates with 2M+ npm packages. Deno 2 brings security and TypeScript native. Bun delivers 3-4x faster HTTP than Node. Which should you pick?

Node.js 22 LTS

Stable, runs everywhere, npm ecosystem. Native TypeScript via --experimental-strip-types. Every cloud and hosting provider supports it. Safe for production.

nvm install 22 && nvm use 22
node --experimental-strip-types server.ts

import { createServer } from 'http';

const server = createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'application/json' });
  res.end(JSON.stringify({ message: 'Hello Node.js 22!' }));
});

server.listen(3000);

Deno 2 (Security-First)

Deno 2 now runs npm packages — the compatibility blocker is gone. No node_modules by default. Explicit permissions (--allow-net, --allow-read). Built-in formatter, linter, test runner. Best for TypeScript-first projects.

curl -fsSL https://deno.land/install.sh | sh
deno run --allow-net server.ts
deno run --allow-net npm:express server.js  # npm compat

import { serve } from 'jsr:@std/http';

serve((req) => {
  return new Response(JSON.stringify({ message: 'Hello Deno 2!' }), {
    headers: { 'Content-Type': 'application/json' }
  });
}, { port: 3000 });

Bun 1.x (Speed Champion)

Written in Zig using JavaScriptCore. Full Node.js API compatibility. 3-4x faster HTTP throughput than Node. Also replaces npm/yarn with much faster installs. TypeScript runs natively without transpilation.

curl -fsSL https://bun.sh/install | bash
bun install     # replaces npm install
bun run dev
bun test
bun server.ts

const server = Bun.serve({
  port: 3000,
  fetch(req) {
    return new Response(JSON.stringify({ message: 'Hello Bun!' }), {
      headers: { 'Content-Type': 'application/json' }
    });
  }
});
console.log(`Running on :${server.port}`);

Performance (2026 Benchmarks)

• HTTP requests/sec: Bun ~120K vs Deno ~90K vs Node ~75K
• Startup time: Bun 8ms vs Node 45ms vs Deno 55ms
• npm install: Bun 0.4s vs pnpm 1.2s vs npm 3.8s

When to Use Each

• Node.js 22: Production APIs, enterprise, maximum ecosystem
• Deno 2: Secure scripts, TypeScript-first, Deno Deploy edge
• Bun: Build tools, CLI scripts, high-throughput APIs, package manager replacement

Conclusion

Node.js 22 is the production default. Use Bun as your package manager even with Node — speed improvement is immediate and zero-friction. Try Deno 2 for new TypeScript projects. All three are worth knowing in 2026.