Union Square Ventures, a venture capital firm focused on early-stage, growth-capital, late stage, and startup financing, led a $12.7m Series A round in Hume AI, a provider of the AI toolkit to measure, understand, and improve how technology affects human emotion. The company, which provides its datasets and models through a unified API platform, intends to use the funds to meet the demand for its technology, which is based on the analysis of human expressive behavior in images, audio, video, or text.