mjml-core is a powerful library designed for creating responsive email templates using MJML (Mailjet Markup Language). It provides the core functionality for rendering MJML into HTML, making it easier for developers to build emails that look great on any device. While mjml-core is a robust option for email template rendering, there are several alternatives in the MJML ecosystem that cater to different use cases. Here are a few notable alternatives:

• mjml is the main MJML library that includes both the core rendering capabilities and additional features for building responsive email templates. It provides a comprehensive set of components and a user-friendly syntax, allowing developers to create complex email layouts with ease. If you are looking for a complete solution that includes both rendering and a rich set of components, mjml is the ideal choice.
• mjml-cli is a command-line interface for MJML that allows developers to convert MJML files into HTML directly from the terminal. This tool is particularly useful for automating the email template generation process in build scripts or CI/CD pipelines. If you prefer working from the command line and want to integrate MJML rendering into your workflow, mjml-cli is a convenient option.
• mjml-react is a library that allows developers to use MJML components as React components. This integration makes it easier to build dynamic and reusable email templates within React applications. If you are developing a React application and want to leverage MJML's capabilities while maintaining a React-friendly syntax, mjml-react is the perfect solution.

To explore how mjml-core compares with mjml, mjml-cli, and mjml-react, check out the comparison: Comparing mjml vs mjml-cli vs mjml-core vs mjml-react.