# Introduction

Welcome to the immudb documentation. Great to see you here!

immudb is a database written in Go, but unlike other databases, it is immutable: history is preserved and can't be changed without clients noticing.

immudb can be used both as a key-value store, or as a relational database (SQL).

The immudb documentation is structured as follows:

In the About section, you can lean more about what makes immudb unique, how it works, and what you can use it for.

Want to dive right in and play around? Get started with the user quickstart
Want to use immudb from your favourite programming language? head to the developer jumpstart
.. or try the immudb Playground, an interactive environment for learning about immudb (opens new window):

This section covers what you need to run immudb in a real server or production environment.

Here you can find a comprehensive list of immudb configuration options and developer APIs.

Here are some external links you may find valuable: