Free Koa Alternatives

Express.js is a free and open-source web application framework for Node.js, released as free and open-source software under the MIT License. Express is designed for building fast web applications and APIs. In the Node.js community the Express framework is seen as the defacto standard when it comes to building such applications. The philosophy of the framework is to provide a small and robust toolset for building HTTP servers with JavaScript and Node.js. Express does not force you to use any specific database, ORM or templating language, as it leaves that up to you as a developer, to maximize freedom and choice. Express.js is used by companies and hobby developers alike to build single page JavaScript applications, websites, hybrids and public HTTP APIs.

AdonisJS is a Node.js web framework designed for building micro-services with JavaScript and Typescript. The framework provides an elegant syntax and and the tools that gives developers the confidence to build structured projects at scale. AdonisJS also includes its own ORM called Lucid, which is an implementation of Active Record, written in JavaScript. The framework will make anyone coming from Laravel or Ruby on Rails to feel right at home in the JavaScript eco-system.

Build powerful, scalable applications, with minimal overhead and full out-of-the-box functionality with Hapi. It's a free and open-source JavaScript framework for Node.js that is developed for enterprise-grade applications. Companies like Walmart, Brave and Condé Nast build web-services with Hapi and rely on it at scale.

Egg.js is a free and open-source JavaScript and Node.js framework for building better enterprise applications.

A modern, fast and highly-performant web framework written in Python. With FastAPI developers can quickly build APIs with performance on par with Node.js and Go thanks to Starlette and Pydantic.

Ruby on Rails is an iconic, free and open source, server-side web application framework released under the liberal MIT license. The Ruby-based framework has helped millions of developer make their ideas a reality. The framework is opinionated and promotes best standards and practices for web development. When combining that with a community that is open, helpful and guiding, it's not hard to see why Ruby on Rails is one of the most loved web application frameworks to this day. Ruby on Rails is also used by industry giants like Basecamp, HEY, GitHub, Shopify, Airbnb, Twitch, SoundCloud, Hulu, Zendesk, Square, Cookpad.

Zend Framework is a web application framework written in PHP that has an open architecture based on middleware or MVC which follows PHP-FIG standards. The framework is designed to follow the best security practices and stores passwords using bcrypt and encrypts data with AES-256. Zend Framework consists of multiple PHP packages that are designed to run separately or work interchangeably together. With Zend Framework you can develop web applications and services using PHP 5.6+, while writing 100% object-oriented code, broad spectrum of PHP specific features.

Amber is a web framework written in the programming language Crystal that makes building web applications fast, simple, and enjoyable. The Amber Framework provides productivity and happiness through a powerful CLI and familiar design patterns seen in Kemal, Rails, Phoenix and other popular frameworks. With the Amber Framework you can build blazing fast web applications that your users will love.