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LiveAvatar powers real-time, conversational avatars — the interactive counterpart to Avatar Realtime, which is built for one-way broadcast streaming. Unlike Avatar Realtime — where your application owns STT and the LLM and HeyGen only renders the face — LiveAvatar can run the whole conversational loop for you: listening, understanding, and responding with a live avatar. It ships in two modes so you can choose how much of that loop HeyGen handles:
  • FULL mode — HeyGen manages the end-to-end conversation (STT, LLM, TTS, turn-taking, memory, and contexts). Bring a prompt and a voice agent and you have a talking, listening avatar.
  • LITE mode — you keep your own agent/LLM and use LiveAvatar for the avatar layer, wiring in integrations like the ElevenLabs Agent plugin.
LiveAvatar has its own API, guides, and concepts, documented on a dedicated site. Each link below opens the relevant page on docs.liveavatar.com.

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Start here

LiveAvatar Overview

What LiveAvatar is, how it works, and how to get set up.

Building with Agents

Agent skills that assess your stack and build the integration end to end.

Sandbox Mode

Try LiveAvatar without wiring up production credentials.

API Reference

25+ endpoints for sessions, avatars, voices, contexts, LLM configs, and secrets.

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Choose a mode

FULL Mode

HeyGen runs the full loop — lifecycle, voice settings, push-to-talk, custom LLM/TTS, and events.

LITE Mode

Bring your own agent — configuration, events, integrations, and the ElevenLabs Agent plugin.

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Core concepts

Avatars

Pick and configure the avatar that fronts your conversation.

Voice Agents

Define the agent that listens and responds in real time.

Voices

Choose and tune the voice your avatar speaks with.

Contexts

Ground the conversation in the knowledge it needs.

Memory

Persist state across turns and sessions.

Secrets & Integrations

Connect external services and manage credentials.

Open the full LiveAvatar Documentation

API reference, guides, changelog, and OpenAPI specs → docs.liveavatar.com