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.
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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