jspm is a package manager for JavaScript that aims to simplify the process of managing and loading modules in web applications. It leverages the ES module standard and provides a seamless experience for developers by allowing them to import modules directly from npm or other sources. With its focus on modern JavaScript development, jspm enables efficient module loading, dependency management, and optimization for production builds. However, there are several alternatives available that also cater to module bundling and management needs. Here are a few notable ones:

• browserify is a tool that allows developers to use Node.js-style require() statements in the browser. It transforms your code into a format that can be run in the browser by bundling all dependencies into a single file. browserify is a great choice for projects that want to maintain a modular structure while ensuring compatibility with older browsers.
• parcel is a web application bundler that offers zero-configuration setup and fast performance. It automatically detects the type of files being used and applies the necessary transformations, making it an excellent choice for developers who want to get started quickly without worrying about configuration. parcel also supports hot module replacement, which enhances the development experience.
• requirejs is a JavaScript file and module loader that uses the Asynchronous Module Definition (AMD) API. It is particularly useful for loading modules in a non-blocking manner, which can improve the performance of web applications. requirejs is suitable for projects that require a modular approach and want to take advantage of asynchronous loading.
• rollup is a module bundler that focuses on optimizing the output for modern JavaScript applications. It is particularly well-suited for libraries and applications that prioritize performance and tree-shaking capabilities. rollup allows developers to create smaller, more efficient bundles by eliminating unused code.
• systemjs is a dynamic module loader that supports multiple module formats, including AMD, CommonJS, and ES modules. It provides a flexible way to load modules in the browser and is often used in conjunction with other tools to enhance module management and loading capabilities.
• vite is a modern build tool that focuses on speed and performance. It uses native ES modules in development, providing instant server start and hot module replacement. vite is ideal for projects that require a fast development experience and want to leverage modern JavaScript features.
• webpack is one of the most popular module bundlers in the JavaScript ecosystem. It allows developers to bundle JavaScript files along with other assets like CSS and images. With its extensive plugin system and configuration options, webpack can handle complex build processes and is suitable for large-scale applications.

To see how jspm compares with browserify, parcel, requirejs, rollup, systemjs, vite, and webpack, check out the comparison: Comparing browserify vs jspm vs parcel vs requirejs vs rollup vs systemjs vs vite vs webpack.