LoopBack won API World's 2019 Best in API Middleware category, see our announcement post.

LoopBack 4


A highly extensible Node.js and TypeScript framework
for building APIs and microservices.


A Brand New Core

A brand new LoopBack core to deliver great extensibility and flexibility written in TypeScript/ES2017.

OpenAPI Spec Driven REST API

Create powerful APIs easily with a new creation experience for defining REST API's and handling API requests/responses.

Unbelievably Extensible

A new, improved programming model with Dependency Injection and new concepts such as Components, Mixins, Repositories, etc. make this the most extensible version yet.

GraphQL Support

Using OpenAPI-to-GraphQL, create a GraphQL interface for any REST API. Learn more...

How Can We Help?

We've curated resources to help you get started faster with LoopBack 4.

Who's using LoopBack?

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Ready to build amazing things?
Try LoopBack 4 now.