Elysia
Ergonomic Framework for Humans
Overview
Elysia is a Bun-first TypeScript backend framework focused on speed, end-to-end type safety, and a great developer experience. It’s optimized for Bun but designed around Web Standards, with integrations for things like WebSockets and OpenAPI/Swagger.
Bun applications, Type-safe APIs, Real-time apps
MIT
Quick Start
Quick start: bun create elysia app → bun dev Optional: run on Node.js via the Node adapter (@elysiajs/node).
Key Features
End-to-end Type Safety
Bun Optimized
OpenAPI Generation
Eden Connector
Pros & Cons
Pros
- Excellent TypeScript DX
- Very fast with Bun
- Great ergonomics
Cons
- Requires Bun
- Very new
Common Use Cases
Compatible Cloud Servers
Find Elysia Experts
Looking for professional help with your Elysia project? Here are top certified agencies and developers.
Top Agencies
Alpina Tech
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.NFQ | Netzfrequenz GmbH
We are a Germany-based digital agency specializing in innovative and data-driven solutions across the entire customer journey. With a strong foundation in technology, strategy, and creativity, we craft tailored digital experiences that enhance brand presence and business growth.
GRANITE
We are a global digital transformation partner with over 160 industry experts, delivering comprehensive digital solutions across experience design, technology engineering, digital marketing, brand innovation, and video production.
NOTUM
#1 RecommendedWe are CMS-centered agency with 7 years of CMS experience. We build scalable corporate websites for scale-ups with headless CMS solutions. From design to deployment, we deliver complete, reliable support.

QBurst
QBurst is a digital engineering company that crafts delightful client experiences through AI-driven software engineering and data solutions.