How I Build AI Receptionists for Small Businesses

Description and use

Small businesses lose customers because calls are missed. An AI receptionist answers instantly, captures lead details, and instantly notifies owners via SMS and email, eliminating the need for a dashboard.

Problem

Small businesses lose jobs because callers are not answered and calls go to voicemail.

Outcome

Clients now receive instant notifications of new leads, reducing missed opportunities and improving lead conversion.

Workflow

• 1. Design conversation flow and personality
• 2. Provide business knowledge (services, pricing, hours)
• 3. Define call flows and fallbacks for unexpected requests
• 4. Perform test calls with varied scenarios
• 5. Set up notification loop (SMS + email) after call analysis

Evidence

Hiring a full‑time receptionist costs $3,000+/month.

Source

Every call answered instantly, 24/7 — nights, weekends, holidays

Source

RetellAI for the voice agent. This is the core — it handles speech-to-text, the LLM conversation, and text-to-speech with low enough latency that callers don't feel like they're talking to a robot.

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Twilio for telephony. The client's business number routes to the AI agent.

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After each call ends, the system waits for the call analysis to complete, then fires two notifications: a short SMS summary to the owner's phone and a detailed email with the call breakdown.

Source