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WhatsApp Voice API

WhatsApp Voice: customers call you from inside the chat.

The customer taps call in the thread they already use. No dialled number, no IVR, no app. The call arrives carrying the whole history, and leaves a recording, transcript and disposition on the same thread.

Start free trialRead the API docs
app.whtapis.com/voice/active
w
Voice — active calllive
On call
02:14
In queue
6
In SLA
94%
MD Michael Doyle Connected · WhatsApp voice live
CB Claire Bertrand Waiting 00:22 · support FR in SLA
HA Hind Alaoui Waiting 00:48 · support AR over SLA
KT Karim Touhami AI agent collecting context AI agent

A live WhatsApp voice call, queued and supervised like any other channel.

WhatsApp cost simulator

Work out your monthly WhatsApp cost — messages and calls.

Template messages and outbound WhatsApp calls, billed by Meta. Inbound calls and replies inside the 24-hour window cost nothing.

USD per month
Channel Volume / month Rate (USD) Cost
WhatsApp — marketing per delivered template
WhatsApp — utility per delivered template
WhatsApp calls — outbound per minute, 6-second pulses · inbound free
Channel subtotal
Paid to Meta
$690.00
Estimated monthly channel cost
Channel total
$0.0151 per customer interaction, across 45,750 interactions

An estimate for planning, not a quote. Meta bills per delivered template by category and destination country, and outbound WhatsApp calls per minute in six-second pulses. Inbound calls are free. Excludes the whtapis platform fee and taxes.

Template examples

What your customers see.

InsuranceUtility
AAssura
TODAY
Claim update · #CL-77310
Good news, Emma. Your car claim is approved. €1,240 will be paid within 3 business days.
Assura Claims09:43
View details
Call my adviser
InsuranceVoice
AAssura
TODAY
Call your adviser
Talk to us on WhatsApp
Tap the call button in this chat — no number to dial, no hold menu.
Free inbound call09:43
Call now
BankingAuthentication
NNorbank
TODAY
482 915 is your verification code. For your security, do not share it.
Expires in 10 minutes09:43
Copy code
BankingUtility
NNorbank
TODAY
Card payment · €86.40
Carrefour Market, today 18:42. Not you? Freeze your card instantly.
Norbank Alerts09:43
It was me
Freeze card

Why this changes the call

A phone call starts from zero: a number, a menu, a security question, a story retold. A call from the thread starts with everything already known.

A dialled phone call
The customer hunts for a number on your website.
An IVR menu asks them to press one through five.
Security questions repeat what your systems already know.
They retell the story the agent could have read.
The call ends and the conversation leaves no trace on the thread.
A WhatsApp voice call
One tap in the conversation they are already in.
Identity resolved from the WhatsApp number before ringing.
Full message history, order and ticket attached to the call.
The AI agent has already captured the reason for calling.
Recording, transcript and summary land on the same thread.
Drop the agent view of a WhatsApp voice call
What the agent sees when a call arrives — history, order and ticket already open.
whtapis — voice shot transcript
Live transcription, searchable across every call afterwards.

Capabilities

Everything you expect of a voice channel, on WhatsApp voice and your PSTN and VoIP traffic alike.

Inbound and outbound
Take calls from the thread, and place calls out to opted-in customers.
Queueing and routing
The same skills, priorities and overflow rules as your PSTN and VoIP queues.
Recording
Per-queue rules, configurable retention, legal hold and regional storage.
Live transcription
Real-time transcript in the agent pane, searchable afterwards across every call.
Whisper and barge-in
Supervisors coach silently or join the call, with the action logged.
AI agent hand-off
The AI agent answers, gathers context, then passes the live call with a summary.
Analytics
AHT, hold, abandon, sentiment and disposition reported beside every other channel.
For developers

Place, receive and control calls from your own application.

Voice uses the same REST API and webhooks as messaging: start, transfer, mute, record, read the transcript, attach a disposition.

Full API reference
POST /v1/voice/calls
{
  "to": "+212600000000",
  "channel": "whatsapp_voice",
  "queue": "support_fr",
  "context": {
    "customer_id": "cus_8842",
    "ticket": "TCK-41229",
    "reason": "delivery_delay"
  },
  "recording": true,
  "transcribe": { "language": "auto" },
  "on_answer_webhook": "https://api.yourapp.com/hooks/call"
}

Questions we get asked first

Does the customer need anything installed?
No. They use the WhatsApp app they already have, on the thread they already have with your business number.
Can we keep our existing phone numbers?
Yes. Classic telephony, SIP trunks and DID ranges run alongside WhatsApp voice in the same queues. Nothing has to be migrated.
Is the call recorded and transcribed?
Both, if you enable them per queue. Retention, storage region and legal hold are configurable, and the transcript is searchable.
What happens outside working hours?
Your choice per queue: an AI agent handles the call, the customer is offered a callback slot, or the call falls back to voicemail on the thread.
On both ends of the call

Someone taps call. Someone answers.

The point of voice inside the thread is that neither side has to work at it — no number to find, no history to re-explain.

Photo: customer on their phone in WhatsApp
The customer, calling from the thread they already use.
whtapis — person agent
The agent, with the full history already open.

Placeholder frames — drop your own photographs in. Each caption says what the shot should show.

The voice console

A WhatsApp voice call, as the agent sees it.

Live transcription, the AI hand-off summary and the whole message history — all present before the agent says hello.

app.whtapis.com/voice/active
whtapis
Inbox
Voice
Campaigns
Wallboard
Reports
Numbers
Team
Settings
JMJulie M.
Voice — active calllive
WhatsApp chat8
WhatsApp voice4
SMS3
VoIP / DID2
Telephony1
Voice queue6 waiting
MD Michael Doyle Connected · agent Julie M. live
CB Claire Bertrand Waiting 00:22 · support FR in SLA
HA Hind Alaoui Waiting 00:48 · support AR over SLA
MF Megan Fraser +1 416 ••• •• 24 · overflow in SLA
KT Karim Touhami AI agent collecting context AI agent
Live call · Michael Doyle
AI summary: chasing delayed delivery for order 41-2298. Carrier shows it in the Casablanca hub. No refund requested. Suggested next step: reschedule the delivery window. handed to Julie at 02:01
WhatsApp voice · connected02:14
Call detail
QueueSupport · WhatsApp voice
Recordingon · transcribing
Supervisorwhisper available

An inbound WhatsApp voice call, with the AI hand-off summary, live transcription and the full thread history attached before the agent says hello.

Activate an accountTour the platform
WhatsApp Business Platform provider

We handle the Meta paperwork. You get a working number.

You supply your business details once — we file everything else
Business verification and number registration submitted for you
Templates drafted, submitted and resubmitted until approved
Live in days, most of it waiting on Meta rather than on you
How provisioning works
Your Meta Business Portfolio Your legal entity, verified with Meta
we provision
Your WhatsApp Business Account Created under your portfolio, not ours
stays yours
What you keep on exit
the numberthe templatesbilling historythe WABA
We hold operating access to run the account on your behalf. Ownership never transfers to us.
Credentials
whtapis — person agent
A named specialist, assigned on day one One person stays with you from Meta verification through to your first live call — reachable on WhatsApp, not through a ticket queue.
WhatsApp Business Platform · provider status to be confirmedMeta Business Partner · verify in Meta’s directoryISO 27001 alignedGDPR · DPA and processing terms availableData residency: EU · US · Africa

Certificates and the security questionnaire are available under NDA.

Your accounts or ours

Bring your own, or we provide it.

Every connection can come from you or from us — and you can mix per country. Switch later without changing platforms.

Service
Bring your own
We provide it
WhatsApp Business Account
Connect your existing WABA and numbers
We create it under your Meta portfolio
SIP trunk
Point your carrier trunk at us, keep your rates
Our trunk, billed per minute
DID numbers
Keep your ranges, or port them in
Local numbers in most countries
SMS gateway
Plug in your gateway, sender IDs and rates
Our gateway, billed per message
PBX / telephony
Your PBX stays in place behind us
Cloud telephony, no hardware
CRM / ERP
Salesforce, HubSpot, Dynamics, SAP and more
Built-in customer record

Most customers mix: their own trunk in one country, our numbers in another.

Take a WhatsApp voice call on your own number this week.

The free trial includes a sandbox voice number, recording, transcription and the supervisor console. Bring a real WhatsApp Business account when you are ready.

Activate an accountTalk to sales
GDPRISO 27001 alignedData residency EU · US · AfricaWhatsApp Business Solution Provider