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Hume AI

Speech-to-speech voice interface that responds to language, tone, rhythm, and vocal expression.

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Pricing

Hume says EVI is free to start and offers enterprise plans.

Overview

Hume AI provides the Empathic Voice Interface, a real-time speech-to-speech system for building voice experiences. EVI transcribes speech, measures vocal expression, generates language, and streams a voice response. Developers can add context, dynamic variables, tools, chat history, and webhooks, then integrate the interface through SDKs for web and mobile applications.

Key features

  • Real-time speech-to-speech conversations
  • Prosody and vocal-expression measurement
  • Interruptible streamed responses
  • Context injection and dynamic variables
  • Tool use through application APIs
  • Transcripts with timestamps and emotion data
  • React, TypeScript, Python, .NET, and Swift SDKs

Use cases

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Last updated 2026-09-16