Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
Koa is described as 'Expressive middleware for node.js using generators via co to make web applications and APIs more enjoyable to write. Koa's middleware flow in a stack-like manner allowing you to perform actions downstream, then filter and manipulate the response upstream' and is a Web Framework in the development category. There are more than 50 alternatives to Koa for a variety of platforms, including Linux, Mac, Windows, Self-Hosted and Web-based apps. The best Koa alternative is Supabase, which is both free and Open Source. Other great apps like Koa are Django, Angular, Firebase and Ruby on Rails.
Pylons Framework is an open source Web application framework written in Python. It makes extensive use of the Web Server Gateway Interface standard to promote reusability and to separate functionality into distinct modules.
Bitweaver is a free and open source web application framework and content management system. Its speed and power are ideal for large-scale community websites and corporate applications, but it is simple enough for non-technical small site users to set up and administrate.
Flexible DataSync is a BAAS with a complete client framework. Developers can build real-time applications and communication services and deploy them easily

Put the fun back in writing Go web applications! A Ruby on Rails inspired, idiomatic, web framework written in Go.
Lumen is the stunningly fast micro-framework by Laravel. Use the Laravel features you love like Eloquent, caching, queues, validation, routing, middleware, and the powerful Laravel service container. All with almost zero configuration.

Take the path less traveled. Or don't. With Trails, there's no cargo cult. Your team can use the design patterns and existing Node modules they already know. The capability of the framework itself is up to you, the developer, by choosing precisely the modules you need to...
Kuzzle is a high performance open source, on premise and cloud agnostic backend for IoT and modern apps featuring CRUD, real-time notifications, authentication, geofencing, a full featured cluster mode and more.
AmplifyJS is a set of components designed to solve common web application problems with a simplistic API. Amplify's goal is to simplify all forms of data handling by providing a unified API for various data sources.