Phonic

Phonic is a voice AI platform built from the ground up for voice agents, including training its own speech-to-speech audio foundation models rather than layering an agent on top of third-party text-to-speech. The platform lets teams build, observe, and evaluate reliable conversational agents that accomplish tasks like verifying benefits and eligibility, resolving support queries, and scheduling appointments, with roughly 300ms end-to-end latency, conversational features (a caller can ask it to repeat slower or speak in a whisper), and natural pacing. Its core thesis is reliability: instead of forcing conversations through rigid pre-defined state machines that break on follow-up questions, Phonic uses an intelligent decision system that adapts to edge cases dynamically, letting customers delete significant state-machine complexity from their codebases. Beyond generation it functions as a system of record with searchable interactions, real-time observability across millions of agents, and evaluations that surface common failure reasons. Deployment spans cloud API or fully containerized on-premises, with HIPAA-compliant voices and workspaces oriented to healthcare and insurance communication teams. Built by researchers and engineers from MIT, Stanford, MosaicML, Meta, and Genesis Therapeutics and backed by notable investors, Phonic sits at the platform and infrastructure tier of the voice lane rather than as a single-vertical call handler.