> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cartesia.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# LiveKit

<Frame>
  <img src="https://mintcdn.com/cartesia-2650f86a/GOsvXpql8JfAlgjy/assets/images/livekit-agents.png?fit=max&auto=format&n=GOsvXpql8JfAlgjy&q=85&s=40fda2b78d535c4400f96caba840ce88" alt="LiveKit Agents logo" width="1200" height="630" data-path="assets/images/livekit-agents.png" />
</Frame>

**LiveKit** is a WebRTC-first platform for realtime **video, voice, and data** in your product. **LiveKit Agents** is its framework for conversational agents.

**Cartesia** integrates in two ways: **LiveKit Inference** (hosted **cartesia/sonic-3** and related model IDs in the agent runtime; keys and pricing are through **LiveKit**—see [LiveKit’s Cartesia TTS guide](https://docs.livekit.io/agents/models/tts/inference/cartesia)) and the open-source **[livekit-plugins-cartesia](https://github.com/livekit/agents/tree/main/livekit-plugins/livekit-plugins-cartesia)** Python package for **TTS and STT** using your **Cartesia** credentials from the worker.

# Demo

Here's a demo of a voice assistant built with LiveKit Agents and Cartesia:

<Card title="LiveKit Cartesia Demo" icon="solid link" href="https://cartesia-assistant.vercel.app/">
  Try out the LiveKit Cartesia demo.
</Card>

The source code for this demo is available [here](https://github.com/livekit-examples/cartesia-voice-agent)