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Build a Voice Receptionist for Your Business
A real phone number, a custom voice, real bookings — callable right now
1 phase. 6 lessons. 6 labs. Build an AI voice receptionist on a real phone number: a custom ElevenLabs voice, a designed conversation flow that handles real caller messiness, real Google Calendar booking with SMS confirmation, business-specific FAQ answers, and full call logging — deployed for real, not left on ngrok.
6 lessons · 6 labs · 1 real phone number · Live bookings
Outcomes you will have by the end
- A real, callable AI receptionist — A live phone number that answers, qualifies, books real appointments, texts confirmations, and answers business questions — deployed persistently, not running from your laptop.
- A working mental model of the voice AI pipeline — STT, LLM, and TTS as 3 distinct hops with their own failure modes and latency contributions — the exact architecture behind every serious voice product, not just Vapi.
- Conversation design for real human unpredictability — A flow tested against mumbling, mid-conversation topic changes, and silence — not just a clean happy-path script, reusable for any voice or chat interface.
- Verified certificate of completion — Issued by DeVenture Academy, tied to your completion record. Lists the voice AI, conversation design, and tool-integration skills you built.
What you will be able to do
Voice AI Architecture · Conversation Design · Real-Time Tool Integration · Knowledge Injection · Production Deployment
Every phase, every lesson, every project
- Build a Voice Receptionist for Your Business (6 lessons) — Voice AI architecture and Vapi, custom ElevenLabs voice, conversation design for real callers, calendar and SMS tool integration, business FAQ knowledge base, call logging and deployment
The technologies you will use
Vapi · ElevenLabs · Google Calendar API · Twilio · Railway
Roles this course prepares you for
- Freelance Voice AI Builder ($1,000-5,000/project) — Build custom voice receptionists for small businesses that currently pay $500-2,000/month for third-party solutions.
- Small Business Owner (Self-Built) (Cost savings vs. $500-2000/mo vendor solutions) — Run your own AI receptionist instead of paying a third-party vendor, fully customized to your actual business.
- AI Automation Consultant ($100-250/hr) — Design and deploy voice automation for clients across industries, using the same architecture for different businesses.
Common questions
Do I need voice AI experience?
No — this course builds the voice pipeline concept from scratch. Some JavaScript/Python is required for the webhook server in Lessons 4 and 6.
How much does this cost to run?
Vapi, ElevenLabs, and Twilio all have free tiers, but real testing (multiple live calls) may exceed free minutes — budget a small amount of real spend, especially for Vapi minutes, per the course's own cost note.
Google Calendar OAuth or Service Account?
This course uses a Service Account for simplicity in a learning context — both paths are viable, but Service Account avoids the more involved interactive OAuth consent flow for a course-scoped build.
What do I end up with?
A real AI receptionist on a real phone number: custom voice, a conversation flow tested against real caller messiness, live calendar booking with SMS confirmation, business FAQ answers, and full call logging — deployed persistently, not left running on your laptop.
Start the Build a Voice Receptionist for Your Business course
Create a free account — the opening phases of 24 of 30 courses are free, no credit card. Or see Pro pricing.
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