---
source_url: https://www.pubnub.com/docs/old
title: PubNub docs
updated_at: 2026-05-22T11:05:33.467Z
---

> Documentation Index
> For a curated overview of PubNub documentation, see: https://www.pubnub.com/docs/llms.txt
> For the full list of all documentation pages, see: https://www.pubnub.com/docs/llms-full.txt


# PubNub docs

PubNub is a highly-available, real-time communication platform optimized for maximum performance. You can use it to build chats, IoT Device Control systems, Geolocation & Dispatch apps, and many other [communication solutions](https://www.pubnub.com/use-case/).

![PubNub Overview Diagram](https://www.pubnub.com/assets/images/pubnub-docs-sm-4b43aa705c71b133b77967ac5eb9d71c.png)

Let us take care of the infrastructure layer of your apps so that you can focus on your application. We're offering global scalability, 5-9’s uptime SLA, and an extendable platform for new real-time use cases and other third-party APIs.

## First steps

Read through the chapters of our first steps documentation to understand how to connect the world in one-tenth of a second.

[Begin your first step →](https://www.pubnub.com/docs/general/basics/set-up-your-account)

## Pricing

We offer a **free plan with basic support** for testing and development. When you're ready to move to production or exceed 200 monthly active users (MAUs) and/or 1 million transactions/Functions executions, you need to upgrade to a [paid account](https://www.pubnub.com/pricing/).

MAUs are unique users (with unique user IDs) that connect to PubNub at least once in a calendar month and send an API call. If you'd rather pay for [transactions](https://www.pubnub.com/pricing/transaction-classification/), you may consider transaction-based pricing.

## Top pick SDKs

* [JavaScript](https://www.pubnub.com/docs/sdks/javascript)
* [Java](https://www.pubnub.com/docs/sdks/java)
* [Kotlin](https://www.pubnub.com/docs/sdks/kotlin)
* [Swift](https://www.pubnub.com/docs/sdks/swift)
* [Python](https://www.pubnub.com/docs/sdks/python)
* [Unity](https://www.pubnub.com/docs/sdks/unity)

[See all SDKs](https://www.pubnub.com/docs/sdks)

## Try PubNub today

Launch and scale your real-time application in minutes on PubNub's reliable and secure network.

## Sign up

Don't feel like leaving this page to sign up?