Open source alternative to Twilio, LivePerson and Retell AI
Last verified
Build real-time voice AI agents on LiveKit's open source WebRTC stack.
Use LiveKit Agents when the agent must talk, listen, interrupt politely, and share state with a web or mobile client in realtime.
Skip if your workflow is asynchronous support chat or batch content generation.
The SIP integration path makes it suitable for inbound or outbound calling experiences where the AI participant needs model tools and call audio.
Skip if you need a call-center suite with workforce management and reporting out of the box.
Realtime AI agents break down when the media layer, speech pipeline, model calls, and client experience all live in separate systems. Teams often start with a chat API, then discover they need WebRTC rooms, phone calls, interruption handling, and a way to route users to server-side agents. The result is a fragile stack where latency and handoff bugs damage the conversation experience.
Runs programmable server-side participants inside LiveKit rooms, so an AI agent can join a session like any other audio or video participant.
Connects STT, LLM, TTS, realtime APIs, and turn detection plugins from one agent framework instead of a custom glue layer.
Works with LiveKit SIP, RPC, and data APIs, which lets agents place or receive calls and exchange structured events with client apps.
Install the Python agent framework in a virtual environment, then connect it to your LiveKit deployment and model providers.
```bash
pip install "livekit-agents[openai,silero,deepgram,cartesia,turn-detector]"
```Yes. The LiveKit Agents repository is Apache-2.0 licensed, and the README points to self-hosting the wider LiveKit stack.
Yes. The framework is built for realtime voice and multimodal agents with STT, TTS, LLM, and turn-detection integrations.
It can replace parts of a paid realtime media or telephony stack when you want control over the WebRTC and agent layer. Twilio may still fit teams that only want managed phone infrastructure.
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Run LiveKit on your own server
Self-host LiveKit on a Hostinger VPS.
Deploy on HostingerFeatured
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