How it works · Honestly Artificial

From caller to lead in 0.5 seconds.

Six steps from the moment your phone rings to a qualified lead in your dashboard. No human in the loop. No silence. No missed revenue.

Synthfy AI live call diagram showing mobile phone interface with Synthfy AI receptionist details
The flow

What happens when a customer calls.

01

Caller dials your business number

Same number your customers already know. We provision a SignalWire DID for you (or port your existing). No phone hardware to buy.

~50ms
02

SignalWire opens an audio stream

The call routes into our async Python engine via real-time real-time secure streaming protocol. MULAW telephone audio frames stream both ways at 8 kHz.

~80ms
03

Ultra-Fast STT transcribes

Industry-leading phonecall STT model converts caller speech into final transcripts in real time. Tuned for noisy phone conditions.

~500ms
04

Groq LPU Engine responds

Loaded with your business prompt, calendar context, and FAQ. Generates streaming responses with function calling for booking and lead capture powered by Groq’s lightning-fast inference.

~500ms
05

Natural TTS speaks back

State-of-the-art TTS produces sub-500ms first-byte audio. Natural prosody, the right “uh-huh”s, no robotic monotone.

~500ms
06

Lead lands in your dashboard

Call recording, transcript, AI summary, caller name, intent, calendar booking (if any) — all surface in your dashboard within seconds of hang-up.

instant
Synthfy dashboard at the moment a call ends
After the call

Lead summary, in your dashboard, in under 30 seconds.

The moment the caller hangs up, the engine fires an HMAC-signed POST to Railway. Our secure database writes the call log, lead row, and usage counters. Your dashboard updates live via real-time secure streaming protocol.

  • Caller name + phone
  • AI-extracted intent
  • Booking confirmation (if any)
  • Full transcript + recording link
  • One-click follow-up actions
The stack

Production-grade infrastructure.

☎

SignalWire

Sole telephony provider. CPaaS-grade DIDs, real-time media streams, call recording . Built on FreeSWITCH.

S

Real-time STT

phonecall model, 8 kHz tuned. Streaming finals with high accuracy on real phone audio.

G

Groq LPU Engine

Ultra-low latency open models on Groq hardware. Function calling for calendar & lead writes.

T

Natural TTS

Optimized voice model. Sub-500ms first byte. Natural prosody. Indistinguishable from human in most contexts.

⚙

Async Python engine

Pipecat-inspired streaming frame pipeline on high-performance cloud computing provider Docker. Manages turns, barge-in, concurrent-call counters via Redis.

⚡

Dashboard + Railway

Tenant auth, lead history, billing. Encrypted database backend. HMAC-signed webhooks from the engine.

See it answer your first call.

7-day free trial. 30 minutes. 50 calls. Not charged during your trial.

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⚠ Emergency Services Disclaimer: Synthfy phone numbers are designated for inbound virtual receptionist use only and do not support 911 or E911 emergency calling. If you need emergency assistance, please dial 911 directly from a standard phone line or mobile device.

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⚠ Emergency Services Disclaimer: Synthfy phone numbers are designated for inbound virtual receptionist use only and do not support 911 or E911 emergency calling. If you need emergency assistance, please dial 911 directly from a standard phone line or mobile device.