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VoiceBridge

AI Voice Calls via WhatsApp

A 10-message text chat costs 10 separate charges. An inbound WhatsApp voice call costs $0 from Meta. VoiceBridge routes support to AI-powered voice calls โ€” faster resolution, zero message fees.

Voice AI Pipeline

1
Customer speaks
WebRTC audio stream
โ†“
2
Speech-to-Text
Deepgram Nova-2
~150ms
โ†“
3
LLM Reasoning
Groq / gpt-4o-mini
~250ms
โ†“
4
Text-to-Speech
Cartesia Sonic
~150ms
โ†“
5
Customer hears AI
WebRTC audio stream

Total end-to-end: ~550ms โ€” well under the 800ms target

Why Voice Calls Win

Inbound Calls = $0

When a customer taps the call icon inside WhatsApp, Meta charges zero delivery or per-minute fees. No matter how long the call lasts.

AI Voice Agent

Real-time STT โ†’ LLM โ†’ TTS pipeline handles common queries: order status, returns, bookings. Sub-800ms target latency.

Human Escalation

If the AI can't handle it, seamless SIP transfer routes the call to a human agent's phone โ€” no dropped calls.

Cost Arbitrage Tracker

See exactly how much you save per call vs the equivalent text conversation. Track voice minutes and message equivalents.

Cost Comparison: Text vs Voice

$0.50
10-message text thread
at $0.05/msg
$0.00
Inbound voice call (Meta)
+ ~$0.12 AI orchestration

76% savings per interaction

Voice is the cheapest channel on WhatsApp