Svelte is a modern JavaScript framework for building user interfaces. Svelte is different from traditional frameworks like React, Vue, or Angular in terms of how it approaches web development. Unlike React and some other frameworks, Svelte does not use a virtual DOM. Instead, it updates the DOM directly based on the changes in state and component logic during the build process. Svelte is a compelling choice for developers who prioritize simplicity, smaller bundle sizes, and a build-time approach to optimizing web applications.