Hume AI

Hume AI, Inc. is a private US software company that provides evaluation, simulation, expression measurement and human-feedback infrastructure for voice AI systems. Its product set includes Kairos Simulate + Evaluate for testing and regression tracking, an Expression Measurement API for analysing emotional and expressive signals in speech, a Human Feedback API for rapid human scoring, and custom data services for training and evaluation. The company serves voice AI engineers, machine learning teams, researchers and product teams building conversational systems. Hume AI generates revenue through a mix of software subscriptions, usage-based API billing and custom enterprise or managed data engagements. Its commercial position is centred on becoming the data and evaluation layer for emotionally intelligent voice AI rather than a consumer application or foundation model provider. The business sells directly to organisations building voice agents and speech systems that need better evaluation quality, benchmark comparability and human-grounded training data.