AI Voice Agent Platform — Your 24/7 Phone Team

Production voice AI agents that answer calls, qualify leads, book appointments into Google Calendar, and handle support — with sub-500ms response times and natural conversation across 5 industry demos.

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The Challenge

Businesses lose leads to unanswered calls, voicemail black holes, and hold-time abandonment. Hiring receptionists is expensive ($30-50K/year) and still leaves gaps outside business hours. Existing IVR systems frustrate callers with rigid menu trees that never actually solve the problem. There's no intelligence layer — traditional phone systems route calls but can't qualify, score, or take action based on what the caller needs.

The Solution

The Voice Agent Platform deploys conversational AI agents that handle real phone calls — both inbound and outbound. Built on Vapi's real-time voice infrastructure, each agent combines an LLM brain (Claude Sonnet or Groq Llama 3.1), speech-to-text (Deepgram Nova-2/3), text-to-speech (Cartesia), and a webhook-driven Express backend that executes real-world actions during live calls. Five production demo agents serve different industries: Clara qualifies leads for CushLabs, James books executive coaching appointments with real-time Google Calendar integration, Sophia runs a med spa front desk, Mike dispatches home service calls, and David — the platform's first outbound agent — proactively calls real estate prospects via Twilio PSTN to qualify buyers and book property tours.

Technical Highlights

Sub-500ms voice response via Vapi WebRTC: microphone → Deepgram STT → LLM → Cartesia TTS → speaker
Outbound PSTN calling — David calls prospects via Twilio with E.164 validation and per-IP rate limiting
Webhook function calling with 8 handlers: calendar booking, database writes, MLS lookup, business logic
Real-time Google Calendar OAuth — checks availability and books confirmed appointments mid-call
Redis session state for multi-turn context across function calls within a single conversation
5-agent deployment across 5 industries with domain-specific LLM, voice, and prompt configurations
Full bilingual EN/ES with client-side i18n and MutationObserver for dynamic Vapi status translation

Results

Every inbound call answered instantly, 24/7 — zero missed leads, zero hold times
Qualified prospects booked directly into Google Calendar before hanging up
Sub-500ms response time delivers natural conversation flow indistinguishable from human agents
5-industry demo suite proves the platform works across verticals, not just one use case
First outbound AI calling agent — David proactively reaches prospects instead of waiting for inbound
L1 support handled automatically, reserving human agents for complex issues that need empathy

Highlights

Good for

Businesses losing leads to unanswered calls, voicemail, and hold-time abandonment
Service companies that need 24/7 phone coverage without hiring full-time receptionists
Industries with appointment-heavy workflows — med spas, real estate, home services, coaching
Anyone evaluating real-time voice AI architecture with production-grade latency

Not a complete solution for

Complex multi-party conference calling or call center routing
Highly regulated industries requiring certified call recording and compliance
Businesses needing deep CRM integration beyond webhook-based data capture

What you get

5 production demo agents across lead qualification, appointment booking, front desk, dispatch, and outbound calling
Express.js webhook backend with Google Calendar, Neon PostgreSQL, and Redis integration
Both inbound (Web SDK) and outbound (Twilio PSTN) calling from a single platform
Domain-specific prompt engineering for each industry vertical
Bilingual EN/ES marketing site with live demo access
Render Blueprint deployment for reproducible infrastructure

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