Elysia

ELI5 — The Vibe Check

Elysia is a Bun-first web framework that's obsessed with speed and developer experience. It has end-to-end type safety like tRPC but works as a full HTTP framework. Think of it as Express if Express was born in the TypeScript-and-Bun era instead of 2010.

Real Talk

Elysia is a TypeScript web framework optimized for Bun runtime, featuring end-to-end type safety, automatic OpenAPI documentation, and exceptional performance. It provides a plugin system, lifecycle hooks, and a unified type system that propagates types from validation to response without code generation.

Show Me The Code

const app = new Elysia()
  .get('/user/:id', ({ params: { id } }) => 
    db.user.findUnique({ where: { id } }),
    { params: t.Object({ id: t.String() }) }
  )
  .listen(3000);

When You'll Hear This

"Elysia gives us tRPC-like type safety in a regular HTTP framework." / "We migrated from Express to Elysia and got 10x better performance on Bun."