@ckeditor/ckeditor5-ui is a powerful user interface component for the CKEditor 5 rich text editor. It provides a set of UI components that can be used to build custom editing experiences in web applications. The library is designed to be flexible and extensible, allowing developers to create tailored editing solutions that fit their specific needs. CKEditor 5 is known for its modern architecture and rich features, making it a popular choice for applications that require a robust text editing experience.

While CKEditor 5 UI is a great option, there are several alternatives available in the React ecosystem that also provide rich text editing capabilities. Here are a few notable alternatives:

• @tinymce/tinymce-react is the official React component for TinyMCE, a widely used rich text editor. TinyMCE offers a rich set of features, including customizable toolbars, plugins, and themes, making it suitable for a variety of applications. The TinyMCE React component allows developers to easily integrate the editor into their React applications while providing a familiar editing experience. If you are looking for a feature-rich editor with extensive customization options, TinyMCE is a solid choice.
• draft-js is a framework for building rich text editors in React, developed by Facebook. It provides a set of APIs for managing content, selection, and styling, allowing developers to create highly customizable text editing experiences. Draft.js is particularly well-suited for applications that require fine-grained control over the editing experience, such as collaborative editing or custom formatting options. If you need a highly customizable editor and are comfortable building your own UI components, Draft.js is worth considering.
• quill is a modern rich text editor that is easy to use and highly customizable. It offers a clean and intuitive interface, along with a variety of features such as themes, formats, and modules. Quill is designed to be lightweight and performant, making it a great choice for applications that prioritize speed and simplicity. The Quill editor can be easily integrated into React applications, providing a straightforward solution for rich text editing.

To see how @ckeditor/ckeditor5-ui compares with @tinymce/tinymce-react, draft-js, and quill, check out the comparison: Comparing @ckeditor/ckeditor5-ui vs @tinymce/tinymce-react vs draft-js vs quill.