Building AI voice agents, real-time multiplayer apps, video conferencing features. The default choice for serious AI voice.
Simple async voice calls — Twilio is fine. Pure transcription workflows — go straight to Deepgram or AssemblyAI.
What is LiveKit?
LiveKit became the default infrastructure for real-time AI voice when OpenAI built ChatGPT Advanced Voice Mode on top of it. The open-source SFU + cloud-hosted version handles audio/video streams with sub-200ms latency at scale. Series B raised $45M in 2024. Now powers voice for Character.ai, Anthropic Claude Voice, Spotify, and most serious AI voice products.
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The infrastructure layer for serious voice AI
LiveKit owns the real-time audio/video stack for AI voice agents — OpenAI's Realtime API runs on it, ChatGPT Voice runs on it. If you're building voice AI, this is the substrate you build on.
LiveKit's position is unusual: they're infrastructure that the most-watched AI voice products already run on top of. The Agents framework abstracts the WebRTC complexity so AI engineers can build voice agents in Python or Node without becoming media engineers. The same SDKs that power consumer ChatGPT Voice power your Vapi competitor or your in-house healthcare voice agent.
The weakness is what infrastructure weaknesses always are: it's a layer below where most product teams want to think. If you're building a vertical voice agent (sales coaching, drive-thru ordering, customer support), Vapi or Bland will get you to a demo faster because they sit on top of LiveKit and add the application layer you'd otherwise build. The trade is flexibility for speed — LiveKit gives you the substrate; Vapi gives you the product.
Buy LiveKit if you're building voice AI as a core product surface and need control over the audio pipeline, latency, and deployment. Use the open-source server for self-hosted, LiveKit Cloud for managed. Use Vapi or Bland on top of it (or instead of it) if you want a vertical agent shipped this week and don't need pipeline-level control.
Teams building voice AI as a core product surface, with engineering capacity to work at the audio infrastructure layer.
Product teams who want a working voice agent in days — Vapi or Bland sit on top of this and ship faster.
Written by StackMatch Editorial. StackMatch editorial reviews are independent analyst commentary, not user reviews. We have no affiliate relationship with this tool. See user reviews below for community perspective.
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