Infrastructure
LiveKit
Open-source WebRTC realtime A/V infrastructure for voice and video agents — the engine behind ChatGPT voice mode.
livekit.io · listing ≠ endorsement · re-checked 2026-09-03
- Founders
- Russ d’Sa & David Zhao
- Founded
- 2021
- Valuation
- $1B · Series C led by Index (Jan 2026)
- Customers
- OpenAI, xAI, Salesforce, Tesla, …
- Role in this wave
- Reported WebRTC layer for fal.live rooms
What is LiveKit?
LiveKit is open-source WebRTC realtime audio/video infrastructure for voice and video agents — best known as the engine behind OpenAI's ChatGPT voice mode, and a $1B-valuation company as of January 2026. Within this wave it is the transport reported under fal.live-style rooms.
What LiveKit does
- Open-source WebRTC realtime audio/video infrastructure
- LiveKit Agents framework for voice and video multimodal agents
- Managed LiveKit Cloud alongside the self-hostable open-source core
- Used by voice products, 911 operators, telehealth and live rooms
Who is LiveKit for?
- Building voice-mode products on top of a proven realtime transport
- Routed live A/V for agents and human-plus-agent apps
- Real-time generative video rooms where a stream needs WebRTC plumbing
Pros and cons of LiveKit
Pros
- Proven at very large scale — reported as the engine behind OpenAI’s ChatGPT voice mode
- Open source with a managed cloud, so you can start free and scale
- Unicorn funding ($1B, Jan 2026) backs long-term investment
Cons
- An infrastructure layer, not an end product — you still build on it
- Self-hosting at scale is real engineering work
- Any specific link to generative-video rooms (e.g. fal.live) is reported, not documented
What people are saying
Verbatim quotes from public coverage — collected 2026-09-03.
“LiveKit powers OpenAI’s ChatGPT voice mode.”
“…the raise of $100 million in funding at a $1 billion valuation.”
Frequently asked questions
What is LiveKit?
Open-source WebRTC realtime audio/video infrastructure plus an agents framework for building voice and video AI applications.
Is LiveKit open source?
Yes — the core is open source and can be self-hosted; LiveKit Cloud is the managed option.
Who uses LiveKit?
TechCrunch reports OpenAI (ChatGPT voice mode), xAI, Salesforce, Tesla, plus 911 operators and mental-health providers.
Is LiveKit related to fal.live?
Any fal.live↔LiveKit link is reported rather than documented as of Sep 2026.
Alternatives in Infrastructure
3
fal.ai
Low-latency generative inference — the “livestream-from-a-model” layer behind much of this wave.fal.ai
Daydream
Open-source, local-first runtime for realtime generative-video pipelines — run a video-diffusion node graph and stream it over WebRTC.livepeer.org