Build voice, video, and physical AI | LiveKit

# LiveKit docs > LiveKit is a platform for building voice and realtime AI applications. LiveKit Cloud is the hosted commercial offering based on the open-source LiveKit project. ## Overview LiveKit is an open-source framework and cloud platform for building voice, video, and physical AI agents. It consists of these primary components: - **LiveKit server**: An open-source WebRTC Selective Forwarding Unit (SFU) that orchestrates realtime communication. Use [LiveKit Cloud](https://cloud.livekit.io) or self-host on your own infrastructure. - **LiveKit Agents framework**: High-level tools for building AI agents in [Python](https://github.com/livekit/agents) or [Node.js](https://github.com/livekit/agents-js), including a [deployment environment](https://docs.livekit.io/agents/ops/deployment.md) for running agents on LiveKit Cloud, a hosted voice AI [inference service](https://docs.livekit.io/agents/models.md#inference), and an extensive [plugin system](https://docs.livekit.io/agents/models.md#plugins) for connecting to a wide range of AI providers. - A global WebRTC-based realtime media server with [realtime SDKs](https://docs.livekit.io/intro/basics/connect.md) for- [Web](https://github.com/livekit/client-sdk-js) - [Swift](https://github.com/livekit/client-sdk-swift) - [Android](https://github.com/livekit/client-sdk-android) - [Flutter](https://github.com/livekit/client-sdk-flutter) - [React Native](https://github.com/livekit/client-sdk-react-native) - [Unity](https://github.com/livekit/client-sdk-unity) - [Python](https://github.com/livekit/client-sdk-python) - [Node.js](https://github.com/livekit/client-sdk-node) - [Rust](https://github.com/livekit/rust-sdks) - [C++](https://github.com/livekit/client-sdk-cpp) - [ESP32](https://github.com/livekit/client-sdk-esp32) - and more - **Integration services**: [Telephony](https://docs.livekit.io/telephony.md) for connecting to phone networks, [Egress](https://docs.livekit.io/intro/basics/egress.md) for recording and streami