Vue.js is an open-source progressive JavaScript framework for building user interfaces. Integration into projects that use other JavaScript libraries is made easy with Vue because it is designed to be incrementally adoptable.
License: Open Source
Polymer focuses on building reusable web components and custom elements, making it ideal for projects that require such capabilities. Vue.js, on the other hand, offers a more flexible and user-friendly approach with a rich ecosystem, making it suitable for a broader range of applications.