react-email is a powerful library designed for building and sending HTML emails using React components. It allows developers to leverage their existing React knowledge to create responsive and visually appealing email templates. With features like server-side rendering and the ability to use JSX syntax, react-email streamlines the process of crafting emails that look great across various email clients. This library is particularly useful for developers who want to maintain a consistent design language between their web applications and email communications.

An alternative to react-email is mjml-react. This library is built on top of MJML, a markup language specifically designed for responsive email design. mjml-react allows developers to write MJML components using React, making it easier to create responsive email templates. The MJML framework automatically handles the complexities of email rendering across different clients, ensuring that emails look good regardless of where they are opened. If you are looking for a solution that focuses on responsive design and compatibility across various email clients, mjml-react is an excellent choice.

To compare these two libraries, check out the following link: Comparing mjml-react vs react-email.