Ultravox.ai

Ultravox.ai is an open-source Speech Language Model (SLM) designed to understand and respond to spoken language in a natural, human-like way. Built to go beyond traditional speech-to-text pipelines, it directly processes audio input to derive intent, generate responses, and interact with users in real time. Its primary purpose is to enable developers and organizations to build conversational voice interfaces, agents, and applications that feel fluid and responsive without relying on multiple disjointed components.

Under the hood, Ultravox.ai integrates automatic speech recognition, language understanding, and response generation into a unified model, reducing latency and complexity. It supports streaming audio, enabling low-lag, turn-by-turn voice interaction suitable for assistants, customer support agents, and interactive voice response (IVR) systems. Because it is open source, teams can inspect, customize, and fine-tune the model for domain-specific vocabularies, accents, and use cases. The architecture is designed to be deployable on modern cloud infrastructure or integrated into existing AI stacks, allowing flexible scaling and integration with tools such as Fixie’s agent platform.