- Svelte is a frontend framework that compiles components into optimized JavaScript code, while SvelteKit builds on Svelte and adds features like server-side rendering and routing.
- Key differences include SvelteKit having built-in routing and server-side rendering capabilities, while Svelte requires external libraries for routing and does not support server-side rendering by default.
- Both support a component-based architecture and use reactive programming, but SvelteKit introduces layouts to define common structures across pages.