HA

Kairos Platform

Platform

by Hume AI

Evaluation platform for voice agents: it builds evaluation suites from real-world use cases, simulates agent-to-agent and human-to-agent conversations against any voice model, and tracks regressions over time.

Find alternatives to Kairos Platform

No price published. Read 2026-09-05: every route is a "Contact Research" button pointing at /sales-form, and no pricing page exists.

What it does

• Evaluation and observability
• Data labelling

Sources

Pricing

Official documentation · 5 Sep 2026

Checked 2026-09-05; sales-form gated.

Description

Official documentation · 5 Sep 2026

Kairos's own page: 'Simulate, evaluate, and benchmark your voice AI — the way humans experience it.' Narrowed in the same commit that wrote the Expression Measurement API and the Human Feedback API as their own records, which the old description absorbed.

What it does

Company disclosure · 24 Sep 2026

'Simulate, evaluate, and benchmark your voice AI - the way humans experience it.' Kairos simulates and evaluates voice agents; it is not a transcription product.

Sold within

Not found · 1 Oct 2026

Hume's Kairos page routes to "Contact Research" ("Configure the suite, run the simulations, and deliver human-grounded results, fast. Contact us to get started."); no plan or price is stated.

URL

Official documentation · 5 Sep 2026

The record pointed at Hume's bare homepage; Kairos has a dedicated page.

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• Empathic Voice Interface (EVI) API service

  Empathic Voice Interface (EVI) is Hume's real-time speech-to-speech voice AI API, described in Hume's docs as 'an advanced, real-time emotionally intelligent voice AI.' The product page markets it as a way to 'Build voice-first AI experiences that understand and respond to human emotions' and states it 'works seamlessly with Claude, GPT, Gemini, Grok, Kimi K2, Llama, and more' - layering voice on top of third-party language models rather than supplying its own. It is billed per conversation minute on Hume's public plans.

• Creator Studio Application

  Creator Studio is Hume's web application, hosted at app.hume.ai, for turning written documents into narrated audio: 'From document to audio, effortlessly. Import your content, assign voices, add acting directions, and export production-ready audio.' Hume targets it at creators producing audiobooks, videos, podcasts, documentaries, e-learning courses and corporate training that need multi-voice narration with emotional direction.

• Expression Measurement API API service

  The Expression Measurement API measures emotional and vocal expression in speech, marketed as 'Measure expression in voice, offline or in real time.' Hume describes two endpoints on the one page: 'The Tagger API returns 600+ expression and voice dimensions from any audio, at scale. The Prosody API delivers real-time emotional expressions during live conversations.' Measured dimensions include emotion categories, speaking styles, vocal qualities such as pace, warmth and hesitation, and expression intensity with confidence scores.

• Human Feedback API API service

  The Human Feedback API sells human evaluation of voice and conversational AI as an API call, marketed as 'One API call. Real human ratings.' and 'Plug human evaluation into your pipeline. Audio in, structured results out.' It supports three study types - live conversations with AI models, single-sample audio ratings with custom questions, and side-by-side A/B comparisons - with Hume handling participant recruitment, quality control and fraud detection. Hume states it powers 'evaluation for Hume's own frontier voice models.'

• Data Solutions Data service

  Data Solutions is Hume's licensed AI training-data offering, headlined 'Voice Training Data Built by Researchers, for Researchers' and described as 'Datasets for creating realistic voices across global languages, powering our own state-of-the-art models, and now available to power yours.' The catalogue spans voice datasets covering 50+ languages, 48+ emotions and 600+ voice descriptors, plus expression and multimodal datasets for facial expression, vocal bursts, speech prosody and text emotion. Hume also sells custom data collection with defined speakers and recording conditions, and API access for programmatic data refresh and generation.

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