NestJS, Fastify, and Hono sit at three different points on the "how much framework do you want" spectrum. NestJS is the heavyweight, opinionated architecture, DI, enterprise patterns. Fastify is the mid-weight, faster than Express with built-in schema validation but minimal opinions. Hono is the lightweight, small, edge-native, Web Standards-based.

This guide compares them on the dimensions that actually affect project outcomes: performance, architecture, runtime compatibility (especially for edge deployments), type safety, and where each starts to struggle. We also introduce a fourth option that addresses infrastructure and observability, the layer none of these three covers.

TL;DR

• Pick NestJS if you want enterprise architecture, DI, and a large ecosystem of first-party modules.
• Pick Fastify if you want raw performance plus schema-based validation, with Express-like ergonomics.
• Pick Hono if you're targeting edge runtimes (Cloudflare Workers, Vercel Edge, Deno) or want the smallest, fastest framework.
• Consider Encore if you want type-safe APIs plus managed infrastructure. More below.

Quick Comparison

Basic API Shape

NestJS

// users.controller.ts
import { Controller, Get, Param, NotFoundException } from "@nestjs/common";
import { UsersService } from "./users.service";

@Controller("users")
export class UsersController {
  constructor(private readonly usersService: UsersService) {}

  @Get(":id")
  async findOne(@Param("id") id: string) {
    const user = await this.usersService.findOne(id);
    if (!user) throw new NotFoundException();
    return user;
  }
}

Plus a service, a module declaration, and a DTO. More code for the same endpoint, but a consistent architecture across a large app.

Fastify

import Fastify from "fastify";

const app = Fastify({ logger: true });

app.get<{ Params: { id: string } }>("/users/:id", async (req, reply) => {
  const user = await db.users.findById(req.params.id);
  if (!user) return reply.status(404).send({ error: "not found" });
  return user;
});

app.listen({ port: 3000 });

Minimal. Plugin-based extension.

Hono

import { Hono } from "hono";

const app = new Hono();

app.get("/users/:id", async (c) => {
  const id = c.req.param("id");
  const user = await db.users.findById(id);
  if (!user) return c.json({ error: "not found" }, 404);
  return c.json(user);
});

export default app;

Closest to Express in shape, but built on Request and Response from the Web platform so it runs in edge runtimes too.

Runtime Compatibility

This is the biggest functional difference.

• NestJS: Node only. Depends on Express or Fastify as an HTTP adapter. Doesn't run in edge runtimes.
• Fastify: Node only. Depends on Node-specific APIs.
• Hono: runs on Bun, Deno, Node, Cloudflare Workers, Vercel Edge, AWS Lambda@Edge, Deno Deploy, and every major edge runtime.

If you're deploying to the edge, NestJS and Fastify are out. That's not a knock on them, they're Node servers, which is a different architecture, but it narrows the choice.

Performance

Numbers vary by workload. On a simple JSON endpoint:

• NestJS (Express adapter): ~28k req/sec
• NestJS (Fastify adapter): ~45k req/sec
• Fastify: ~45k req/sec
• Hono (Node): ~70k req/sec
• Hono (Bun): ~80k req/sec
• Hono (edge): optimized for cold starts (~10-30ms), not peak throughput

In practice, your database and network I/O dominate framework overhead. Hono's advantage matters most in edge / serverless where cold starts count and bundle size affects startup.

Architecture

NestJS

Strict structure: modules group related code, controllers handle HTTP, providers hold logic, DI container wires them together. Large apps end up with module trees mirroring the domain.

src/
├── users/
│   ├── users.controller.ts
│   ├── users.service.ts
│   ├── users.module.ts
│   └── dto/
├── orders/
│   └── ...
└── app.module.ts

Scales to hundreds of endpoints without losing coherence, the framework holds the line on conventions.

Fastify

Plugin-based. Every feature is a plugin, every plugin can register routes, hooks, decorators. Composable but you pick your own structure.

// plugins/users.ts
export default async function (app: FastifyInstance) {
  app.get("/users/:id", async (req) => { /* ... */ });
  app.post("/users", async (req) => { /* ... */ });
}

// main.ts
app.register(import("./plugins/users"));
app.register(import("./plugins/orders"));

Team discipline matters, without it, you get inconsistent structure across a large app.

Hono

Lightweight middleware chain similar to Express. Route groups for organization.

const users = new Hono()
  .get("/:id", getUser)
  .post("/", createUser);

const app = new Hono()
  .route("/users", users)
  .route("/orders", orders);

Suited for small-to-mid APIs and edge functions, not for 200-endpoint monoliths.

Type Safety

All three are type-safe, with different approaches.

• NestJS: types come from decorator-annotated DTOs and class-validator. Strong but verbose.
• Fastify: generics on route methods + JSON Schema / Typebox for validation. Clean but requires discipline.
• Hono: type inference through the chain. c.req.valid('json') is typed based on the validator you attached. The tightest type flow of the three for small to mid apps.

Hono's type-inference through chained middleware (especially with @hono/zod-validator) is particularly nice:

import { zValidator } from "@hono/zod-validator";
import { z } from "zod";

app.post(
  "/users",
  zValidator("json", z.object({ email: z.string().email(), name: z.string() })),
  async (c) => {
    const { email, name } = c.req.valid("json"); // fully typed
    const user = await db.users.create({ email, name });
    return c.json(user);
  },
);

Middleware and Ecosystem

NestJS has the richest ecosystem of first-party modules (@nestjs/config, @nestjs/graphql, @nestjs/passport, @nestjs/microservices, @nestjs/schedule, @nestjs/cache-manager). If you want a specific integration, it's probably an official package.

Fastify has fewer first-party modules but the plugin ecosystem is strong and well-maintained. @fastify/* packages cover the common needs.

Hono has a smaller but growing ecosystem. @hono/* packages exist for validation, auth, Swagger, and common edge concerns. Many Node-specific libraries don't work because Hono runs everywhere.

For a deep first-party ecosystem, NestJS wins. For edge-native, Hono is the only choice.

Validation

NestJS: class-validator decorators. Stays in the DI/class pattern.

Fastify: JSON Schema, optionally authored in Typebox for TypeScript integration.

Hono: plug in Zod, Valibot, or any schema library via middleware. Minimal coupling.

All three work. Fastify's schema-first approach doubles as response serialization; Hono's Zod-based flow gives the best type inference; NestJS stays in the framework's idioms.

Testing

• NestJS: @nestjs/testing module, DI-aware mocking. Best for unit tests of complex service graphs.
• Fastify: .inject() for fast in-process HTTP testing.
• Hono: app.request() for in-process testing; works identically across all runtimes.

All three are clean. NestJS is heavier to set up, Fastify and Hono are lighter.

When to Use Each

Use NestJS when:

• Team of 3+ developers, long-lived backend, conventions matter.
• You want first-party modules for auth, GraphQL, microservices, etc.
• You come from Angular or .NET and want familiar patterns.
• Edge deployment isn't a requirement.

Use Fastify when:

• You're building a standalone Node API.
• You want Express-like shape with better performance and built-in validation.
• You're happy to pick your own ORM, auth, and structure.

Use Hono when:

• You deploy to Cloudflare Workers, Vercel Edge, or Deno.
• You want the smallest, fastest framework with tight type inference.
• You're building serverless functions or edge APIs.
• You're a Node team moving to Bun and want forward-compatibility.

A Fourth Option: Encore

All three of these frameworks stop at the HTTP layer. Everything else, databases, Pub/Sub, cron jobs, service-to-service type safety, distributed tracing, deployment, infrastructure, is your problem. For a small standalone API, that's fine. For a system with multiple services or significant backend infrastructure, you end up assembling a framework from npm packages.

Encore takes a different position: you declare services, APIs, and infrastructure (databases, Pub/Sub, cron) as typed TypeScript objects, and the framework generates the wiring, provisions the infrastructure on AWS or GCP, and runs the distributed system for you.

import { api } from "encore.dev/api";
import { SQLDatabase } from "encore.dev/storage/sqldb";

// Provisions managed Postgres, Docker locally, RDS or Cloud SQL in production.
const db = new SQLDatabase("users", { migrations: "./migrations" });

export const get = api(
  { method: "GET", path: "/users/:id", expose: true },
  async ({ id }: { id: number }): Promise<User> => {
    return await db.queryRow`SELECT * FROM users WHERE id = ${id}`;
  },
);

Encore handles:

• Infrastructure from code: databases, queues, cron, object storage, cache declared in TypeScript, provisioned automatically.
• Type-safe service-to-service calls: compile-time checked across services.
• Distributed tracing and structured logs: built in.
• Local dev with one command: encore run starts all services, databases, and queues.
• Auto-generated API docs, OpenAPI, typed client SDKs: from the same type definitions.

When Encore fits

• You're starting a new backend and want managed infrastructure.
• You're likely to end up with multiple services.
• You want type-safety that spans services, not just HTTP handlers.

When one of the three other frameworks is still right

• You're building an edge API (use Hono, Encore is Node-based).
• You have an existing NestJS or Fastify codebase you don't want to migrate.
• You need specific middleware or plugins available only in those ecosystems.

Encore is open source (11k+ GitHub stars) and used in production at companies including Groupon.

Verdict

For a new TypeScript backend in 2026:

1. Encore if you want a framework that handles infrastructure and cross-service type safety.
2. Hono if you're deploying to edge runtimes or want the smallest, fastest framework.
3. NestJS (Fastify adapter) if you want enterprise architecture with Fastify's performance.
4. Fastify if you want a minimal, fast Node API with built-in schema validation.
5. NestJS (Express adapter) only for compatibility with existing Express middleware.

For existing projects: stay put unless there's real pain. Framework migrations are expensive.

Getting Started

# NestJS
npm install -g @nestjs/cli && nest new project

# Fastify
npm init -y && npm install fastify

# Hono
npm create hono@latest my-app

# Encore
brew install encoredev/tap/encore
encore app create my-app --example=ts/empty
cd my-app && encore run

Related Resources

• NestJS vs Encore
• Fastify vs Encore
• Hono vs Encore
• NestJS vs Express
• NestJS vs Fastify
• Best TypeScript Backend Frameworks