Leptos Has a Free Framework: Build Full-Stack Web Apps in Rust With Fine-Grained Reactivity and Zero Virtual DOM

You write Rust for backends because you love the type safety and performance. But your frontend is still React — a separate language, separate toolchain, separate mental model. What if your entire web app — server, client, routing, data fetching — was one Rust codebase with compile-time guarantees? That's Leptos. What Leptos Actually Does Leptos is a full-stack Rust web framework with fine-grained reactivity. Unlike React's virtual DOM diffing, Leptos tracks exactly which DOM nodes depend on which signals. When data changes, only the affected text node or attribute updates — no tree diffing, no reconciliation. Leptos compiles to WebAssembly for the client and native code for the server. Server functions let you write backend logic inline with your components — the framework handles the RPC boundary. The result: a full-stack web app in one language with type-safe API calls between client and server. Leptos supports SSR, SSG, hydration, streaming HTML, and islands architecture. Open-sour