Ember.js is an open-source JavaScript web framework, based on the Model–view–viewmodel (MVVM) pattern. It allows developers to create scalable single-page web applications. Developed by emberjs
License: Open Source
Backbone.js is a lightweight and flexible framework that is ideal for small projects and provides a straightforward way to structure JavaScript applications. In contrast, Ember.js is a more opinionated framework that comes with built-in features such as two-way data binding and an integrated routing system, making it suitable for larger applications but with a steeper learning curve.