What are some alternatives?
When comparing Atomize by Quarkly and Rebass, you can also consider the following products
React Rainbow Components - Build your web application in a snap.
Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions
React Storybook - Develop and design React components without an app.
Bulma - Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
React Figma - Render React components to Figma
Ant Design - An enterprise-class UI design language and React implementation with a set of high-quality React components, one of best React UI library for enterprises