express vs koa vs fastify vs sails vs hapi vs nest
Node.js Web Frameworks Comparison
1 Year
expresskoafastifysailshapinest
What's Node.js Web Frameworks?

Node.js web frameworks are essential tools that simplify the process of building web applications and APIs. They provide a structured way to handle HTTP requests, manage middleware, and define routes, allowing developers to focus on application logic rather than low-level server management. Each framework has its unique features and design philosophies, catering to different development needs, performance requirements, and scalability concerns. Understanding the strengths and weaknesses of these frameworks can help developers choose the right tool for their specific project requirements.

Package Weekly Downloads Trend
Github Stars Ranking
Stat Detail
Package
Downloads
Stars
Size
Issues
Publish
License
express37,870,44466,714197 kB17411 days agoMIT
koa3,495,93535,39661.8 kB185 days agoMIT
fastify2,343,57233,4432.57 MB9417 days agoMIT
sails36,11422,8613.26 MB5914 months agoMIT
hapi33,98314,690-786 years agoBSD-3-Clause
nest13,917---13 years ago-
Feature Comparison: express vs koa vs fastify vs sails vs hapi vs nest

Performance

  • express:

    Express is lightweight and fast for small applications, but it may not be the best choice for high-performance scenarios due to its middleware overhead.

  • koa:

    Koa is designed to be minimal and efficient, allowing developers to build high-performance applications with less overhead than Express.

  • fastify:

    Fastify is optimized for performance, boasting a low overhead and high throughput, making it one of the fastest Node.js frameworks available.

  • sails:

    Sails has a larger footprint due to its MVC structure and built-in features, which can impact performance for very high-load applications.

  • hapi:

    Hapi provides good performance but is generally slower than Fastify due to its extensive feature set and plugin architecture.

  • nest:

    Nest offers good performance, but the complexity of its architecture can introduce some overhead compared to simpler frameworks.

Architecture

  • express:

    Express follows a minimalist architecture, allowing developers to structure their applications as they see fit. It provides a simple routing system and middleware support but leaves much of the architecture up to the developer.

  • koa:

    Koa is designed to be a lightweight foundation, allowing developers to build their application architecture from the ground up using modern JavaScript features like async/await.

  • fastify:

    Fastify promotes a plugin-based architecture, encouraging modular design and reusable components, which can lead to better organization in larger applications.

  • sails:

    Sails follows the MVC (Model-View-Controller) pattern, providing a structured approach to application development, which can be beneficial for larger projects.

  • hapi:

    Hapi has a robust architecture with a focus on configuration and extensibility. It encourages a clear separation of concerns and is well-suited for complex applications.

  • nest:

    Nest uses a modular architecture inspired by Angular, promoting the use of modules, controllers, and services, which helps in organizing large applications effectively.

Ecosystem

  • express:

    Express has a vast ecosystem with a plethora of middleware available, making it easy to extend functionality for various needs.

  • koa:

    Koa's ecosystem is smaller, but it benefits from being compatible with many Express middleware, allowing for flexibility in choosing tools.

  • fastify:

    Fastify has a growing ecosystem, but it is not as extensive as Express. However, it offers a solid set of plugins for common use cases.

  • sails:

    Sails has a more opinionated ecosystem, providing built-in features for real-time applications and data-driven APIs, but it may be less flexible than others.

  • hapi:

    Hapi has a rich ecosystem of plugins that enhance its functionality, allowing for easy integration of features like authentication and validation.

  • nest:

    Nest has a strong ecosystem, especially for TypeScript developers, with many modules available for various functionalities, including GraphQL and WebSockets.

Learning Curve

  • express:

    Express has a gentle learning curve, making it easy for beginners to get started with server-side development in Node.js.

  • koa:

    Koa's minimalistic approach can be both a blessing and a curse; while it is straightforward, developers must understand middleware concepts deeply to use it effectively.

  • fastify:

    Fastify is relatively easy to learn, especially for those familiar with Express, but its unique features may require some adjustment.

  • sails:

    Sails has a moderate learning curve due to its MVC structure and built-in features, which can be beneficial for those familiar with similar frameworks.

  • hapi:

    Hapi has a steeper learning curve due to its extensive configuration options and plugin system, which may overwhelm newcomers.

  • nest:

    Nest has a steeper learning curve, especially for those not familiar with TypeScript or Angular-like architectures, but it pays off in the long run for complex applications.

Community Support

  • express:

    Express has one of the largest communities in the Node.js ecosystem, ensuring ample resources, tutorials, and third-party middleware.

  • koa:

    Koa has a smaller community compared to Express, but it benefits from the support of developers who appreciate its modern approach.

  • fastify:

    Fastify's community is growing rapidly, and its documentation is comprehensive, making it easier for newcomers to find help.

  • sails:

    Sails has a smaller community, but it has dedicated users who contribute to its development and provide support.

  • hapi:

    Hapi has a dedicated community, but it is smaller than Express. However, its documentation is thorough and helpful for developers.

  • nest:

    Nest has a vibrant community, especially among TypeScript developers, with a wealth of resources and support available.

How to Choose: express vs koa vs fastify vs sails vs hapi vs nest
  • express:

    Choose Express for its simplicity and flexibility. It is ideal for small to medium-sized applications and APIs, where you want to quickly set up a server and have full control over the middleware stack.

  • koa:

    Choose Koa if you prefer a minimalistic approach with modern JavaScript features. Koa is designed to be lightweight and expressive, making it a great choice for developers who want to build APIs with async/await syntax.

  • fastify:

    Choose Fastify if performance is a priority. It is designed for speed and low overhead, making it suitable for high-throughput applications and microservices that require fast response times.

  • sails:

    Choose Sails if you need a full-featured MVC framework that resembles Ruby on Rails. It is particularly useful for building data-driven APIs and applications with real-time features.

  • hapi:

    Choose Hapi for its rich plugin system and built-in support for input validation, caching, and authentication. It is well-suited for large-scale applications that require a robust architecture and extensive configuration options.

  • nest:

    Choose Nest if you are building a large-scale enterprise application that requires a modular architecture. It leverages TypeScript and provides a powerful dependency injection system, making it suitable for complex applications.

README for express

Express Logo

Fast, unopinionated, minimalist web framework for Node.js.

This project has a Code of Conduct.

Table of contents

NPM Version NPM Downloads OpenSSF Scorecard Badge

import express from 'express'

const app = express()

app.get('/', (req, res) => {
  res.send('Hello World')
})

app.listen(3000)

Installation

This is a Node.js module available through the npm registry.

Before installing, download and install Node.js. Node.js 18 or higher is required.

If this is a brand new project, make sure to create a package.json first with the npm init command.

Installation is done using the npm install command:

npm install express

Follow our installing guide for more information.

Features

  • Robust routing
  • Focus on high performance
  • Super-high test coverage
  • HTTP helpers (redirection, caching, etc)
  • View system supporting 14+ template engines
  • Content negotiation
  • Executable for generating applications quickly

Docs & Community

PROTIP Be sure to read the migration guide to v5

Quick Start

The quickest way to get started with express is to utilize the executable express(1) to generate an application as shown below:

Install the executable. The executable's major version will match Express's:

npm install -g express-generator@4

Create the app:

express /tmp/foo && cd /tmp/foo

Install dependencies:

npm install

Start the server:

npm start

View the website at: http://localhost:3000

Philosophy

The Express philosophy is to provide small, robust tooling for HTTP servers, making it a great solution for single page applications, websites, hybrids, or public HTTP APIs.

Express does not force you to use any specific ORM or template engine. With support for over 14 template engines via @ladjs/consolidate, you can quickly craft your perfect framework.

Examples

To view the examples, clone the Express repository:

git clone https://github.com/expressjs/express.git --depth 1 && cd express

Then install the dependencies:

npm install

Then run whichever example you want:

node examples/content-negotiation

Contributing

Linux Build Test Coverage

The Express.js project welcomes all constructive contributions. Contributions take many forms, from code for bug fixes and enhancements, to additions and fixes to documentation, additional tests, triaging incoming pull requests and issues, and more!

See the Contributing Guide for more technical details on contributing.

Security Issues

If you discover a security vulnerability in Express, please see Security Policies and Procedures.

Running Tests

To run the test suite, first install the dependencies:

npm install

Then run npm test:

npm test

People

The original author of Express is TJ Holowaychuk

List of all contributors

TC (Technical Committee)

TC emeriti members

TC emeriti members

Triagers

Triagers emeriti members

Emeritus Triagers

License

MIT