Vapi

Vapi is the API platform for deploying advanced, human-like voice AI agents with sub-600ms latency across phone, web, and custom applications.

Vapi is the core developer platform for building and scaling voice AI agents, handling complex infrastructure so you focus on the experience. The system orchestrates three core technologies (Speech-to-Text, LLM, Text-to-Speech) to enable real-time, natural conversations: achieving sub-600ms response times for human-like turn-taking. Agents offer full phone integration (inbound/outbound calls) and web embedding, plus Tool Calling to connect to your existing APIs for complex workflows (e.g., appointment scheduling, data retrieval). This is a modular, enterprise-grade solution designed for reliability and scale.

https://vapi.ai