Alpine.js is a very lightweight library, weighing in at only a few kilobytes. It is designed to be a small and unobtrusive framework, great for enhancing interactivity in small projects. Svelte, on the other hand, is a full-featured framework and its bundle size depends on the size of the application. While bigger than Alpine.js, Svelte's performance benefits and capabilities often outweigh the larger bundle size.
Community and Ecosystem
Alpine.js is well-suited for small to medium-sized projects, where developers want to enhance interactivity and add dynamic behavior without introducing a large framework. It is often used for progressive enhancement and quick prototyping. Svelte, on the other hand, shines in larger projects where developers are looking for a full-featured framework that provides efficient rendering, reactive data handling, and advanced component capabilities.