tsup is a modern bundler for JavaScript and TypeScript projects that focuses on simplicity and speed. It leverages the power of esbuild under the hood, providing a zero-config setup for building libraries and applications. With features like tree-shaking, minification, and support for multiple entry points, tsup is an excellent choice for developers looking for an efficient and straightforward bundling solution.

While tsup offers a compelling approach to bundling, there are several alternatives in the ecosystem that cater to different needs:

• esbuild is a highly performant JavaScript bundler and minifier that is designed for speed. It is written in Go and can handle large codebases with remarkable efficiency. esbuild is particularly well-suited for projects that require rapid build times and supports modern JavaScript features out of the box. If you prioritize speed and performance in your build process, esbuild is a strong contender.
• rollup is a module bundler for JavaScript that is particularly popular for building libraries and applications that use ES modules. It excels in creating optimized bundles with tree-shaking capabilities, ensuring that only the necessary code is included in the final output. rollup is ideal for projects that require a high level of optimization and a focus on module-based architecture.
• webpack is one of the most widely used module bundlers in the JavaScript ecosystem. It offers a comprehensive feature set, including code splitting, lazy loading, and a rich plugin ecosystem. While it can be more complex to configure compared to tsup, webpack is highly customizable and can handle a wide range of use cases, making it suitable for large-scale applications.

To see how tsup compares with esbuild, rollup, and webpack, check out the comparison: Comparing esbuild vs rollup vs tsup vs webpack.