WhatsApp Shared Inbox: How Your Whole Team Can Answer One Number
Most small businesses start WhatsApp support on one phone. It works until two people need to answer at the same time, the phone goes home with whoever had the last shift, or a customer's question sits unread because everyone assumed someone else saw it. A WhatsApp shared inbox fixes this: one business number, answered by the whole team from their own computers.
This guide explains what a shared inbox is, what you need to set one up, and how to run it so nothing slips through.
What is a WhatsApp shared inbox?
A shared inbox connects your WhatsApp business number to a support tool instead of a single phone. Every message arrives in a common list that all your agents can see. Each conversation can be assigned to one person, so two agents never reply to the same customer, and anyone can pick up where a colleague left off because the whole history is right there.
The customer notices none of this. They message your number in WhatsApp as usual and get answers from it.
WhatsApp Business app vs. the WhatsApp Business Platform
There are two products with similar names:
- The WhatsApp Business app is the free app on a phone. It's designed for one person, maybe two, and can't be connected to most team tools.
- The WhatsApp Business Platform (often called the WhatsApp Business API) is Meta's service for companies. It's what shared inboxes use, because it lets software send and receive messages on your number.
To give a team access, you need the Platform. You set it up in a Meta developer app, connect a phone number, and point Meta's webhook at your support tool.
The 24-hour rule you need to know
WhatsApp protects people from spam with a simple rule: after a customer messages you, you can reply freely for 24 hours from their last message. After that window closes, you can only send pre-approved template messages until they write again.
In practice this means: answer quickly, and don't leave conversations hanging overnight if you can help it. A good shared inbox shows you when a reply couldn't be delivered, so you know to ask the customer to message again.
How to set it up, step by step
Here's the setup in our WhatsApp, Instagram and Messenger inbox; other tools follow a similar path.
- Create a Meta app. At developers.facebook.com, create a Business app and add the WhatsApp product.
- Connect your number. Add the phone number you want customers to message, and note its phone number ID.
- Create a permanent token. The temporary test token stops working after 24 hours, so create a System User in Meta Business Settings and give it a permanent token.
- Paste the webhook details. Copy the callback URL and verify token from your inbox's Channels page into the Meta app's Webhooks section, and subscribe to messages.
- Save and test. Send a WhatsApp message to your number. It should appear in your inbox within seconds.
Running a WhatsApp inbox well
Once messages flow in, a few habits make the difference:
- Assign every conversation. Automatic routing to the agent with the fewest open chats keeps the load fair and makes ownership clear.
- Use saved replies for common questions. Delivery times, opening hours and returns come up daily. Answer them in one click and spend your time on the hard ones.
- Let an AI assistant cover the night shift. An AI chatbot that answers from your help articles can reply instantly at 2 a.m. and hand the conversation to a person in the morning when it needs one.
- Keep photos and voice notes in the thread. Customers send pictures of damaged parcels and voice notes describing problems. They should land in the conversation, not on someone's phone. Voice notes can even be written out automatically, so agents can read instead of listen.
Bring Instagram, Messenger and your website into the same place
Customers don't stick to one app. The same person might ask a question in your website chat, follow up on Instagram and send a receipt on WhatsApp. When all of those arrive in one inbox, your team answers from one screen and sees every conversation with that customer.
Getting started
A WhatsApp shared inbox is one of the quickest ways to make a small team feel bigger. You can start free, connect your number from the Channels page, and have your whole team answering WhatsApp in under an hour.