Builds / Voice Front Desk

Voice Front Desk

A phone agent that answers, books, and routes calls.

Advanced build · Support & voice · 6 parts · Running cost: No listed price + model usage

Callers get a natural voice that understands them, checks the calendar, and books or routes — around the clock. Built from specialist layers rather than one black box.

What drives the cost: Medium — per-minute voice pricing

Recommended after Support Desk Agent.

The parts

Voice agent

Retell AI — Tool. Orchestrates the live call: turn-taking, interruptions, latency.

Alternatives: Deepgram, Plivo

Brain

GPT-5.6 Sol — Model. Low-latency reasoning that keeps the conversation moving.

Alternatives: Gemini 3.8 Live, GPT-5.6 Luna

Speech-to-text

Deepgram — Tool. Accurate live transcription, even on bad lines.

Alternatives: AssemblyAI, Rev AI

Voice

ElevenLabs — Tool. A voice callers don't immediately clock as a robot.

Alternatives: Play.ht, Resemble AI

Phone lines

AgentPhone — Tool. Numbers, routing, and telephony plumbing for AI agents.

Alternatives: Plivo

Calendar (optional)

Google Calendar — Skill. Real availability, real bookings.

Run this build

Start the build and it becomes a checklist: for each part, mark the one you already have, pick an alternative of the same kind, or compare the options side by side. Every part you confirm goes onto your stack, and the build is complete when every required part is filled.

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