Quill is described as 'free, open source WYSIWYG editor built for the modern web. With its modular architecture and expressive API, it is completely customizable to fulfill any need' and is an app in the Development category. There are more than 25 alternatives to Quill for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Internet Explorer, Safari and Opera. The best alternative is TinyMCE, which is both free and Open Source. Other great apps like Quill are CKEditor (Paid, Open Source), Trumbowyg (Free, Open Source), Editor.js (Free, Open Source) and Aloha Editor (Free, Open Source).
Editor.js is a block-styled editor for rich media stories. It outputs clean data in JSON instead of heavy HTML-markup. And more important thing is that Editor.js is designed to be API extendable and pluggable. So there are few key features: 1. Clean data output