Hume AI

Overview

Hume AI's Octave models generate speech with natural prosody and controllable emotion, backed by a real-time Empathic Voice Interface (EVI) for conversational experiences. It focuses on making synthetic voices sound genuinely expressive rather than flat, and its API is among the most affordable at roughly $7.60 per million characters.

How Hume AI works

Hume's Octave models treat emotion as an input. You can describe how a line should sound, such as calm, urgent or warm, and the model adjusts prosody accordingly instead of reading everything in one tone.

For interactive products, the Empathic Voice Interface handles real-time conversation. Voice cloning and conversion are available, and the pricing is low for an API, which makes it practical to experiment.

Getting started with Hume AI

1. Open the Hume playground and try the same line with different emotional directions.
2. Choose or clone a voice and test it on dialogue from your product.
3. Call the TTS API for narration, or integrate EVI for live conversation.
4. Monitor character usage against your plan.

Is Hume AI the right choice?

Choose Hume when expressiveness matters, such as companion apps, games and coaching tools. For plain narration at scale, simpler engines may be enough.

Who should use Hume AI

Developers building conversational agents and apps that need emotionally expressive, controllable speech — not just flat narration.

Try Hume AI

Ready to try it? Visit the Hume AI official website to preview the available voices, check current plan limits and pricing, and test it on a sample of your own script.