Octave 2 (preview) and EVI 4-mini are live! Expanded language support and lower latency for faster, more natural responses. Learn more.
Hume is a research lab and technology company with a mission to ensure that artificial intelligence is built to serve human goals and emotional well-being.
Hume develops two categories of models: speech-language models that interpret and generate expressive speech, and expression measurement models that analyze vocal, facial, and verbal expression.
These models are available through three APIs: the Empathic Voice Interface (EVI) for real-time voice interaction, Text-to-Speech (TTS) for expressive speech synthesis, and Expression Measurement for analyzing expression in media and text.
Hume’s Empathic Voice Interface (EVI) is an advanced, real-time emotionally intelligent voice AI. EVI measures users’ nuanced vocal modulations and responds to them using a speech-language model, which guides language and speech generation. Trained on millions of human interactions, our speech-language model unites language modeling and text-to-speech with better EQ, prosody, end-of-turn detection, interruptibility, and alignment.
Visit our Platform’s no-code interface for testing and configuring EVI.
See our API reference for EVI WebSocket and REST endpoints.
Octave TTS is the first text-to-speech system built on LLM intelligence. Unlike conventional TTS that merely “reads” words, Octave is a “speech-language model” that understands what words mean in context, unlocking a new level of expressiveness and nuance.
Check out our Platform’s no-code interface for testing Octave’s capabilities.
See our API reference for TTS streaming and non-streaming endpoints.
Hume’s state-of-the-art expression measurement models for the voice, face, and language are built on 10+ years of research and advances in semantic space theory pioneered by Alan Cowen. Our expression measurement models are able to capture hundreds of dimensions of human expression in audio, video, and images.
Explore our Platform’s no-code interface for testing Hume’s expression measurement models.
See our API reference for streaming and batch expression measurement endpoints.
Voice defines how speech is delivered, shaping tone, pacing, accent, and personality. It plays a central role in how listeners perceive meaning and emotion.
All voices in Hume’s platform are powered by Octave, a speech-language model built on LLM intelligence. Octave enables expressive, context-aware speech generation from both text and natural language descriptions.
Voices can be used across both EVI and TTS to tailor how content is spoken.
Learn how to create custom voices using descriptive prompts and Octave’s expressive generation.
Clone a voice from a recorded or uploaded speech sample with user consent.
Jumpstart your development with SDKs built for Hume APIs. They handle authentication, requests, and workflows to make integration straightforward. With support for React, TypeScript, and Python, our SDKs provide the tools you need to build efficiently across different environments.
Integrate Hume’s Empathic Voice Interface into React apps with tools for audio recording, playback, and API interaction
Integrate Hume APIs directly into your Node application or frontend Web applications
Access Hume’s APIs in Python with async/sync clients, error handling, and streaming tools
Build iOS and macOS apps with EVI voice chat, microphone capture, realtime playback, and TTS file streaming
Use Hume’s APIs in .NET with typed TTS clients, automatic retries, pagination, and configurable timeouts
Explore step-by-step guides and sample projects for integrating Hume APIs. Our GitHub repositories include ready-to-use code and open-source SDKs to support your development process in various environments.
Browse sample code and projects designed to help you integrate Hume APIs
Explore all of Hume’s open-source SDKs, examples, and public-facing code
Need help? Our team is here to support you.