Elysia
elysiajs.comErgonomic Framework for Humans
Dev Toolstypescriptweb-frameworkbuntype-safetyopenapirest-apiopen-source
About
Elysia is a TypeScript web framework optimized for Bun that emphasizes end-to-end type safety, high performance, and developer ergonomics. It uses a single schema as the source of truth for request validation, type inference, and OpenAPI documentation generation. Elysia supports multiple validators, WebSockets, OpenTelemetry, and client-server type sharing via its Eden client.
Problem
Building type-safe, high-performance web servers in TypeScript requires juggling multiple tools and lacks unified type integrity across validation, documentation, and client communication.
For
TypeScript and JavaScript backend developers
How it works
Developers define a schema once that drives runtime request validation, TypeScript type inference, and OpenAPI documentation generation, all within a fluent API running on the Bun runtime.
Business model
open-source
Status
launched