LiveKit reaches $1 billion valuation as voice AI infrastructure demand surges across industries

LiveKit Secures $100 Million Funding at $1 Billion Valuation

LiveKit has closed a $100 million funding round at a $1 billion valuation, marking a significant milestone for the infrastructure software company that powers real-time AI voice and video applications 1

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. The Series C funding, led by Index Ventures with participation from Salesforce Ventures, Altimeter Capital Management, Hanabi Capital, and Redpoint Ventures, arrives just ten months after LiveKit's previous fundraise 2

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. The company has now raised $183 million in total since its founding 3

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The AI developer platform serves over 200,000 developers and teams building real-time voice AI applications across industries 4

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. LiveKit's customer roster includes OpenAI, xAI, Salesforce, Tesla, and Spotify, along with 911 emergency service operators and mental health providers 1

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. The company's infrastructure notably powers ChatGPT voice mode, OpenAI's conversational AI feature that requires ultra-low latency streaming capabilities 3

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From Open-Source Project to Enterprise Infrastructure

Co-founders Russ d'Sa and David Zhao launched LiveKit in 2021 as an open-source project during the pandemic, when video platforms like Zoom demonstrated the demand for real-time communications technology 2

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. The founders initially built infrastructure software for transmitting audio and video without interruptions, placing their tools in a public GitHub repository where developers from companies like Spotify and Oracle began experimenting with them 2

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The business model shifted when larger enterprises requested managed cloud services rather than self-hosting the open-source software. "We love what you've done in open source—but can you build a cloud version, a global network, and we can just pay you to operate that?" d'Sa recalled customers asking . This pivot to offering a cloud platform and enterprise-grade services transformed LiveKit from a free developer tool into a commercial infrastructure provider 1

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Real-Time AI Voice Powers ChatGPT and Beyond

LiveKit's breakthrough came through an unexpected connection with OpenAI. In 2022, d'Sa built a demo pairing LiveKit's technology with ChatGPT to enable voice queries instead of text input. Someone at OpenAI discovered the demo and signed up using a personal Gmail account, eventually leading to a commercial partnership that made LiveKit the infrastructure behind ChatGPT voice mode .

The platform's technical architecture includes a WebRTC-based framework and Selective Forwarding Unit that routes audio, video, and data between participants with minimal latency 3

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. LiveKit coordinates different models and detects when users interrupt AI agents, helping systems understand when to speak and when to listen while managing traffic loads and spikes . This infrastructure proves critical for creating natural, human-like interactions that users will actually engage with, according to Index Ventures partner Sahir Azam .

Voice Agents Deploy Across Industries

Since ChatGPT's voice capabilities launched, voice AI has been deployed in thousands of applications spanning financial services, healthcare, retail, customer support, education, and robotics applications 4

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. Voice agents now help process insurance claims, tutor students, triage patients, support customers, and interview job candidates. Tesla uses voice AI for sales, support, insurance, and roadside assistance, while Salesforce's Agentforce voice agents handle customer support for major brands 4

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Russ d'Sa anticipates 2026 will mark the year voice AI achieves broad deployment across thousands of use cases globally 4

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. Large enterprises are currently evaluating and building voice agents to automate workflows, improve customer experiences, and unlock new revenue streams, though many implementations remain in proof-of-concept stages with some advancing to production scale 4

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Expansion Plans and Robotics Focus

LiveKit plans to deploy the new funding to expand product engineering, sales, and marketing operations . The company currently employs 100 people and expects to double its workforce within the next year . Investment will also support building out new compute, storage, and network services to scale infrastructure for computer vision-driven applications and multimodal applications 3

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The company is particularly focused on expanding into robotics, where the same real-time communications requirements apply to systems interacting with the physical world through cameras, microphones, and sensors 4

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. Azam from Index Ventures believes LiveKit is establishing one of the most important infrastructure layers in the AI stack, with near-term applications in call centers evolving toward longer-term robotics and autonomy use cases 4

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D'Sa acknowledges that LiveKit may increasingly face competition from some of its own customers, including OpenAI . The company's developer-first approach and composable architecture aim to keep it accessible and scalable for teams of all sizes, according to Salesforce Ventures 3

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. LiveKit's investor base includes prominent angel investors such as Google Chief Scientist Jeff Dean and CEOs from Perplexity AI, Replit, Vercel, and ElevenLabs .