> For the complete documentation index, see [llms.txt](https://docs.usegravity.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.usegravity.app/gravity-server/introduction.md).

# Introduction

The Gravity Server powers your application’s core infrastructure — including authentication, billing, APIs, and business logic.

#### By Architecture

**Next.js** \
The server is built directly into your Next.js app.\
There’s no separate backend. API routes, server actions, and logic all live in one codebase.

**Node.js**\
Gravity Server is a standalone backend application.\
\
It connects to:

* Gravity Web (React frontend)
* Gravity Native (React Native app)