Fixie.AI
To deliver the best all-around conversational experience by building real-time, speech-native AI that understands tone, emotion, and context.
At a Glance
- Software Developers
- Enterprise Customer Success Teams
- Sales Automation Startups
AI Tools by Fixie.AI
(1)
Ultravox
Real Time Voice AI Platform
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Products & Services
A managed platform for building real-time, speech-native AI voice assistants.
A series of speech-language models (SLMs) that process audio natively, available for download on Hugging Face.
A context-aware, audio-native endpoint detection (Voice Activity Detection) model.
SDKs for React Native, Pipecat integration, and telephony support (SIP).
Market Position
Ultravox positions itself as a speech-native platform that bypasses traditional ASR transcription losses, offering lower latency and better context awareness than 'orchestrator' designs.
Leadership
Founders
Zach Koch
CEO. Former Product Director at Shopify and lead on the Chrome and Android teams at Google.
Justin Uberti
CTO. Previously at Google as the creator of WebRTC and architect of Hangouts, Duo, and Stadia. Original architect of AOL Instant Messenger (AIM).
Matt Welsh
Founder (former CEO). Previously Engineering Lead at OctoML and Google; former Professor of Computer Science at Harvard University.
Hessam Bagherinezhad
Chief AI Officer. Previously Lead on the Core ML team at Apple.
Zhongqiang (ZQ) Huang
Chief Scientist. Former Senior Staff Engineer at Alibaba Group (multilingual NLP/speech translation) and Senior Research Scientist at BBN Technologies.
Executive Team
Zach Koch
CEO
Ex-Shopify, Ex-Google.
Justin Uberti
CTO
Ex-Google (WebRTC), Ex-AOL.
Board of Directors
Founding Story
Founded by veterans from Google, Apple, and Shopify to bridge the gap between human speech and AI. Initially started as Fixie.ai to simplify LLM app building, it pivoted to focus on speech-native voice AI (Ultravox).
Business Model
Revenue Model
Usage-based pricing (per-minute voice calls) and monthly subscriptions for higher-tier features.
Pricing Tiers
30 min free calls, unlimited playground, up to 5 concurrent calls.
Includes all Pay-As-You-Go features, no hard caps on concurrency, outbound call scheduler, 5 custom voices.
Priority SLA, organization support, fully customizable features.
Target Markets
- Software Developers
- Enterprise Customer Success Teams
- Sales Automation Startups
- Customer Engagement and Support
- Sales Automation and Outreach
- Real-time Multilingual Translation
- Personal Assistants and Booking Agents
- 11x
- Inworld