The world's most realistic voice AI, in real-time

Prompt the first LLM for text-to-speech to create new voices, instruct emotions, and more

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A text-to-speech system that understands what it's saying

Octave (Omni-capable text and voice engine) isn't a traditional TTS model. It’s a voice-based LLM. That means it understands what words mean in context, so it can predict emotions, cadence, and more.

For developers

Build the most realistic, high quality audio models into your products with our APIs and SDKs

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Text to speech API

Octave (Omni Capable Text and Voice Engine) is a new kind of voice AI that understands what words mean in context, unlocking humanlike expressiveness and nuance for any voice. With <200ms latency, Octave 2 is available in 11+ languages including:

English

Japanese

Korean

Spanish

French

Portuguese

Italian

German

Russian

Hindi

Arabic

Speech to speech API

EVI (Empathic Voice Interface) is a speech-to-speech foundation model. The same intelligence understands and generates language and speech, enabling it to sound human. You can seamlessly merge EVI's low-latency responses with any language model, including:

Hume

Claude Sonnet 4.5

Grok 4 Fast

GPT 5

+20 more

Tools for Every Platform

Easy to get started with our cross-language development suite:

Python SDK

Typescript SDK

Swift SDK

React SDK

C# SDK

For enterprise

Deliver new experiences and save costs for your enterprise

Democratizing Audiobook Creation with Hume's TTS

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Content creation tools

Integrate the most realistic AI voices into your media creation platform. Let your users access hundreds of high-quality voices instantly in over 11 languages for their audiobooks, podcasts, or videos.

Democratizing Audiobook Creation with Hume's TTS

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AI characters

Power your game character or AI companion with Hume's text to speech or speech to speech API. Deliver expressive and reliable interactions at a cost that makes sense for your application.