Official WhatsApp Business API

Run your whole customer channel on WhatsApp.

A shared inbox, broadcasts, click-to-chat links, automation and voice calls — on the official WhatsApp Business API, wired straight into your CRM.

Official API · No code · Cancel anytime

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Zhat Convex Store

business account

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Powering conversations for teams in

RetailE-commerceClinicsReal estateTravelLogisticsHospitalityEducation
The problem

Most WhatsApp tools break the moment they meet real volume.

Not because sending a message is hard — because everything around the message is. Windows expire, tokens die, agents collide, and campaigns can't be measured. We built for that reality first.

  • 01

    The 24-hour window closes

    Most tools go silent. Meta only allows an approved template after that — so re-engagement has to be built in, not bolted on.

  • 02

    Two agents open the same chat

    Replies collide and customers get answered twice. Ownership, assignment and audit trails have to exist before volume, not after.

  • 03

    An access token expires

    Sends fail silently and nobody notices for a day. Failures should be visible, recoverable, and retried automatically.

  • 04

    A campaign goes out

    Nobody can say which poster, page or QR actually produced the conversation. If it isn’t attributed, it isn’t a channel — it’s a guess.

New campaignScheduled
12,480 recipients

Delivered 9,102 · Read 6,540

Rich media, broadcast at scale

Send a product image, a video, a PDF or your full catalog to thousands of opted-in customers — each as a personal 1:1 WhatsApp message. Schedule it, personalize it, and watch deliveries and reads roll in live.

  • Image, video, PDF & catalog
  • Schedule & personalize
  • Live delivery & read receipts
Team inbox3 open
  • IT
    Imran Textiles

    Do you ship the full catalog to Lahore?

    2m
  • FN
    Fatima Noor

    Got the product video — looks great, thank you!

    Assigned to Sara
    9m
  • BM
    Bright Mart

    Can we reorder the same bundle as last month?

    1h

Every reply in one shared inbox

Replies land in a shared team inbox. Assign chats, tag conversations, fire off saved replies, and never lose a customer message again.

  • Assign chats
  • Tag conversations
  • Saved replies

Plugs into the tools you already run

Chat channels, your CRM, your store and your spreadsheets — installed like plugins, configured in minutes, all feeding the same inbox.

Explore all integrations →

Everything included

Everything you need to run WhatsApp like a channel

Voice calls, in the browser

Take and place real WhatsApp calls from the inbox — no phone, no app. Ring routing, mute, live quality and per-minute cost on every call.

Broadcast groups

Message hundreds of customers at once. Each one receives a private 1:1 chat, and their replies come back into a single thread.

Click-to-chat & QR

Links and QR codes that open WhatsApp pre-filled. Every tap, scan and resulting conversation is counted — so you know what actually works.

Automation that answers

Welcome messages, off-hours replies and guided question flows — with instant hand-off to a human the moment one is needed.

Team inbox & roles

Assign, tag and resolve conversations. Granular permissions, internal notes, and a record of exactly who replied.

Bitrix24 CRM sync

Chats become leads and deals automatically, and stay in step both ways — so sales never has to copy a conversation by hand.

How it works

Live in three steps

  1. 01

    Connect your number

    Link your business number to the official WhatsApp Business API and get green-tick verification — guided, no code.

  2. 02

    Compose with media

    Build a message with images, video, a catalog or a PDF, add buttons, and pick your audience.

  3. 03

    Send & track

    Broadcast at scale, then watch delivered/read receipts and replies in real time.

Proof at scale

Numbers that keep the conversation going

Security & compliance

Built to survive the security review.

Customer conversations are among the most sensitive data a business holds. We treat them that way.

Official WhatsApp Business API

Built on Meta’s Cloud API — never an unofficial bridge or a phone farm. Your number stays yours and can’t be banned for using us.

Credentials encrypted at rest

Access tokens are sealed with AES-256-GCM before they touch the database. Nothing sensitive is ever sent to the browser.

Every webhook verified

Inbound events are HMAC signature-checked against Meta’s app secret and rejected if they don’t match. Spoofed traffic never reaches your inbox.

Role-based access + audit log

Granular permissions per role, and an append-only record of who sent, edited, deleted or called — so you can answer “who did that?”.

Isolated per workspace

Every query is scoped to your account at the database layer. One tenant can never read another’s conversations, numbers or media.

Your data stays yours

Export it, or delete it and we delete it. No resale, no model training on your customer conversations. Ever.

Loved by teams

Businesses that made WhatsApp their best channel

"We sent our new catalog to 8,000 customers on a Sunday and had 300 replies by Monday. Nothing else we've tried comes close."
Maya R.Ops Lead, D2C skincare
"Delivery and read receipts changed how we forecast — we finally see which campaigns actually land."
Daniel K.Growth, electronics retail
"Our team handles 4x the conversations in one shared inbox without dropping a single message."
Priya S.Support Manager, travel
"Sending PDFs and price lists over WhatsApp cut our quote turnaround from a day to minutes."
Omar A.Sales Director, building supplies
"Setup took an afternoon. Green-tick verification and our first broadcast went out the same week."
Lena M.Founder, boutique fashion
"The API lets us trigger order updates straight from our system — customers love the media receipts."
Tomás V.CTO, grocery delivery
Pricing

Priced per month. No setup fee.

Every plan includes the shared inbox, automation, templates and CRM sync. Meta's own conversation fees are billed by Meta — we don't mark them up.

Starter

For a small team getting going.

$49/mo

  • Unlimited messages / month
  • 3 team members
  • 1 WhatsApp numbers
  • 5 message templates
  • Broadcast groups up to 5 members
  • Voice calling not included
  • AI Chatbot add-on: $9.99/mo · 3,000 AI chats, then $6.99/1,000

Business

High-volume messaging for established operations.

$199/mo

  • Unlimited messages / month
  • 10 team members
  • 10 WhatsApp numbers
  • 15 message templates
  • Broadcast groups up to 200 members
  • Voice calling included
  • AI Chatbot add-on: $34.99/mo · 15,000 AI chats, then $6.99/1,000

Enterprise

High volume, custom terms.

Custom

  • Unlimited numbers & members
  • Volume messaging rates
  • Dedicated infrastructure
  • SSO & custom retention
  • Onboarding + SLA

Cancel anytime · No contract · Your data stays yours

What we believe

No hype. Just a channel that holds.

Compliance is a feature, not a footnote

We never work around Meta’s rules — no grey-market gateways, no scraped numbers. The boring path is the one that survives.

Failures should be loud

A dead token, a blocked send, a missed call: you see it, with the fix one click away. Silent failure is the real outage.

If it isn’t measured, it isn’t a channel

Every link, QR, broadcast and call is attributed and costed. Opinions about what’s working are cheap; numbers aren’t.

Your customers, your data

No resale. No training on your conversations. Export or delete whenever you like.

No unofficial gatewaysNo hidden markupNo silent failuresNo lock-inNo spam

FAQ

Questions, answered

Still have questions?

Talk to us

Yes. Sending on the official WhatsApp Business Platform requires a Meta Business account, a verified business and a registered phone number. Zhat Convex walks you through Meta Business verification, number registration and message-template approval. Note that the green "Official Business Account" tick is granted at Meta's sole discretion based on how well known your brand is — no provider can promise it.

They are two separate things, and we keep them separate. You pay Zhat Convex a flat platform subscription for the software — Starter $49, Pro $99 or Business $199 per month. Meta's messaging charges are metered on top: WhatsApp bills per delivered message, priced by the recipient's country and the message category. Zhat Convex meters every message against Meta's own billable flag and draws it from a WhatsApp budget you top up, using a published country-by-category rate card. There is no invented "5,000 messages included" allowance — you see what each message actually costs.

It is the 24 hours after a customer's most recent message to you, during which you may reply with free-form messages. Inside that window, service replies are free — Meta does not charge for them, and neither do we. Once it closes you can only re-open the conversation with an approved message template, which is billable. Zhat Convex tracks the window on every conversation, shows agents how long is left, and requires a template automatically once it has expired.

Yes — natively, and in both directions. Zhat Convex creates leads, deals and contacts in Bitrix24 from WhatsApp conversations, syncs lead status back, and mirrors your employees and departments. A field-mapping editor lets you decide exactly which WhatsApp fields land in which Bitrix24 fields, so you are not forced into someone else's schema. Zoho CRM is supported the same way, and the connector layer is pluggable for more CRMs.

The AI Chatbot is an optional add-on that answers customers automatically from a knowledge base you upload. It costs $9.99/month on Starter (3,000 AI chats included), $19.99/month on Pro (8,000 chats) and $34.99/month on Business (15,000 chats). Past the included quota the bot keeps answering and extra chats bill at a flat $6.99 per 1,000 on every plan — usage never cuts off mid-conversation.

Yes. Images, video, audio, documents and location all work, subject to WhatsApp's media type and size limits. Media is the core of the platform, not an add-on.

Yes. WhatsApp requires recipient opt-in before you send them business-initiated messages. Zhat Convex provides opt-in capture through click-to-chat links and QR codes, and honours opt-outs automatically.

A phone number can only be active on one WhatsApp product at a time, so a number currently used in the WhatsApp Business app must be migrated to the Business Platform before it can send through Zhat Convex. Once migrated, you can run multiple numbers in one workspace — one on Starter, three on Pro and ten on Business.

Every workspace is isolated from every other. Credentials are encrypted at rest, inbound webhooks are signature-verified before they are trusted, access is controlled by six distinct roles, and every privileged action is written to an immutable audit log.