Voice AI focus . Company targets natural real-time speech-to-speech technology. The company said it will use the capital to advance a real-time speech-to-speech system designed to reduce latency in enterprise voice interactions. Market Context: Real-Time Voice AIEnterprise voice AI is entering production as converging infrastructure, measurable outcomes and compliance-ready deployment patterns accelerate contact center adoption. Five9's Voice AI Agents, launched in June, combine low-latency streaming, secure tool calling and multi-agent orchestration in one platform.