Express.js vs Hono.js: The Modern TypeScript API Landscape on Node and Bun

For the last ten years, starting a new JavaScript backend meant typing npm install express without a second thought. It became pure industry muscle memory.

In this article I will explain why relying on that default choice is holding back your developer velocity and runtime performance in 2026. The backend ecosystem has evolved, and we now have runtimes like Bun and Cloudflare Workers that completely bypass traditional Node.js bottlenecks.

If you want to understand whether you should stick with Express for your next API or migrate to a modern alternative like Hono, this guide covers the exact architectural tradeoffs you need to weigh.

The State of JavaScript API Frameworks in 2026

For a decade, Express.js was the undisputed king of Node. It provided the mental model for how we think about web routing and middleware. But the framework has barely changed since 2014.

Meanwhile, Hono.js emerged as the modern standard. Hono is a small, ultrafast web framework built on Web Standard APIs. It does not care if you run it on Node, Bun, Deno, or AWS Lambda. It just works, and it works fast.

What is the performance difference between Express and Hono?

In synthetic HTTP benchmarks, Hono running on Bun delivers 3 to 5 times higher throughput than Express running on Node.js. Hono easily clears 300,000 requests per second for simple JSON routes, while Express tops out between 60,000 and 90,000 requests per second. At typical production loads, this translates to lower memory overhead and much faster cold starts on serverless platforms.

Why Express Shows Its Age

Express was built for a different era of JavaScript. It was designed before Promises, before async/await, and long before TypeScript became the industry default.

When you write an Express API in TypeScript today, you are bolting types onto a framework that inherently resists them. You have to manually type your request parameters, query strings, and response bodies. If you change a route path, your types do not automatically update.

Look at a standard Express TypeScript setup:

import express, { Request, Response } from "express";

const app = express();

// You must manually declare the shapes of req and res
app.get("/api/users/:id", (req: Request, res: Response) => {
  const userId = req.params.id;
  res.json({ id: userId, status: "active" });
});

You get basic autocomplete, but the framework itself offers zero compile-time guarantees about the relationship between your route parameter :id and the req.params object. It requires constant manual synchronization.

Why Hono Is Winning Developers

Hono approaches the problem backwards compared to Express. It assumes you are writing TypeScript, and it assumes you want to deploy anywhere.

1. First-Class TypeScript Support

Hono infers types directly from your route definitions. You do not need to import external Request or Response types. The framework knows exactly what variables exist in your URL path.

Here is the Hono equivalent:

import { Hono } from "hono";

const app = new Hono();

// The context 'c' knows 'id' is a string because of the route definition
app.get("/api/users/:id", (c) => {
  const userId = c.req.param("id");
  return c.json({ id: userId, status: "active" });
});

Hono even ships with an RPC client. You can share your backend types directly with your React or Astro frontend. When you change a backend response, your frontend build immediately fails if it expects the old structure.

2. Multi-Runtime and Edge Ready

Express requires Node.js. It relies heavily on Node’s specific http module.

Hono relies on standard Web APIs like fetch. This means you can write your API once and deploy it to Cloudflare Workers, Vercel Edge, AWS Lambda, Deno, or Bun. You are never locked into a single hosting provider or runtime environment.

To start a new Hono project on Bun, the CLI experience takes seconds:

bun create hono@latest my-api
# Select 'bun' when prompted for the template
cd my-api
bun install
bun run dev

Performance and Architecture Benchmarks

Synthetic benchmarks do not perfectly reflect production database workloads, but they do expose the architectural overhead of the framework itself.

When you pair a fast runtime like Bun with a fast router like Hono (using its RegExpRouter), the latency drops dramatically. Express suffers from old middleware chaining logic that forces every request through a series of expensive synchronous checks.

Here is a visual breakdown of how the architecture differs:

Legacy Architecture

graph TD
    subgraph Legacy Architecture
        Node[Node.js Runtime] --> Express[Express.js Router]
        Express --> Middleware[Linear Middleware Chain]
        Middleware --> Handler1[Manual Type Casting]
    end

    style Node fill:#e2e2e2,stroke:#333,stroke-width:2px
    style Express fill:#e2e2e2,stroke:#333,stroke-width:2px

Modern Architecture

graph TD
    subgraph Modern Architecture
        Bun[Bun / Edge Runtime] --> Hono[Hono RegExpRouter]
        Hono --> Handler2[Inferred Type Context]
    end

    style Bun fill:#f9d5e5,stroke:#333,stroke-width:2px
    style Hono fill:#f9d5e5,stroke:#333,stroke-width:2px

For most startup APIs, the raw throughput gap (300k vs 90k requests per second) will not be the deciding factor. You will likely hit database connection limits long before you max out the Node event loop. But the memory efficiency of Hono matters. It allows you to run more containers on cheaper infrastructure, or bypass containers entirely in favor of edge functions.

Decision Guide: Express or Hono?

You do not need to rewrite your profitable, stable Express applications. But for greenfield projects, the default choice has shifted.

Keep using Express if:

• You have a massive legacy codebase heavily reliant on older Express specific middleware.
• Your entire team only knows Express and you need to ship a feature by Friday.
• You are relying on a niche third-party library that hardcodes Express req and res objects.

Choose Hono if:

• You are starting a new TypeScript API and want compile-time safety without boilerplate.
• You want to use modern JavaScript runtimes like Bun for faster local development.
• You plan to deploy to serverless or edge environments where cold start times directly impact user experience.

Where to go next

• What Is FastAPI? Why It Became the Modern Backend Standard Discover why Python developers are leaving Flask and Django behind for modern API development.
• FastAPI vs Go for MVP Backends: Change vs Stability See how Python and Go compare when choosing a backend for your startup’s MVP.