LiveKit Agents vs OpenAI Realtime API

Pick two tools from the same category to compare side-by-side.

	LiveKit Agents Open-source realtime framework from LiveKit for building voice, video, and multimodal AI agents.	OpenAI Realtime API Speech-to-speech realtime model API for building low-latency voice agents.
Category	voice	voice
Vendor type	hybrid	commercial
Pricing	freemium	usage
Strengths	+ Full STT-LLM-TTS pipeline with turn detection and interruption handling built in + Apache 2.0 licensed with Python and Node.js SDKs + Telephony support and multi-agent handoff for complex call flows + Self-hostable or managed via LiveKit Cloud with built-in observability	+ Single model handling speech-to-speech with reasoning and tool calling + Multiple transports including WebRTC, WebSocket, and SIP for telephony + Low-latency persistent sessions for natural turn-taking + Specialized variants for live translation and streaming transcription
Tradeoffs	− Tightly coupled to LiveKit's room/WebRTC infrastructure model − Running production-grade realtime media servers yourself adds significant ops burden versus using LiveKit Cloud	− Locked to OpenAI models with no provider choice − Closed, cloud-only API − Realtime audio pricing can be costly at scale
Used in stacks	0	0