Voice

Vapi

Low-latency framework for building conversational voice agents with any LLM and TTS provider.

Overview

Vapi abstracts the complex WebRTC and audio routing required for real-time voice conversations, letting developers connect an LLM backend with a voice model via a unified SDK. It handles interruption handling, latency optimization, and phone/web dialing out of the box.

Best for

customer service bots
voice AI demos
telehealth assistants

Trade-offs

vs Retell AI

Vapi offers broader LLM/TTS provider flexibility and simpler webhooks; Retell AI provides deeper VAD/interruption tuning and on-device optimization.

What XeroHack pre-wires

When you pick Vapi in the interview, the engine emits these files into your scaffold:

websocket agent loop
phone number provisioning
call recording & transcription toggle

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