WhatsApp Business with multiple users on one number. A Socianet guide.

WhatsApp Business multiple users on one number (sales guide)

October 02, 2026

The WhatsApp Business app runs on one phone plus up to four additional devices, all signed in as the same account. That works for two or three people who talk to each other all day. Past that, sales teams move the number onto the WhatsApp Business Platform (the API), where each rep has their own login and each lead has one owner.

Below are the three ways to set it up, what each costs and what happens to your chat history. Rules and charges were checked against Meta’s own pages on 2 October 2026.

The app’s real limit

WhatsApp announced multi-phone linking on 25 April 2023. Your main phone holds the account, and you can link up to four more devices to it. The same announcement says employees can reply to customers from their own phones under the same WhatsApp Business account, so sharing is allowed.

The limit is the account itself. The app has one identity, the business. Every linked device sees every chat, and no message carries the name of the person who typed it. WhatsApp also logs out all linked devices if the main phone is inactive for a long period.

WhatsApp’s Business app features page says a Meta Verified business can link up to 10 devices and agents (checked on 2 October 2026). WhatsApp also says Meta Verified, a paid subscription, lets you assign chats to agents in the app. Check inside your own app for what your account allows.

Why linked devices break down as the team grows

Sales teams feel the limit in four places.

Who owns the lead. Say Delta Freight asks for a quotation at 16:50. Amaka reads it between calls. Tolu sees it marked as read and assumes it is handled. Nobody replies until the next morning.
Who replied last. The chat shows that the business replied, without saying which rep. Whoever takes the customer’s next call has to guess what was promised.
What happens when a rep is off or leaves. Nobody is told to cover a rep on leave. A rep who leaves keeps access until someone removes their device from the main phone.
What the manager can see. Chats, one at a time. There is no count of new leads, no time to first reply and no list of quotes waiting for a follow-up.

Option 1: linked devices on the Business app

Best for two or three reps who sit together. A few rules keep it working.

Put the number on a phone the company owns. Keep it charged and in the office.
Link each rep’s phone or laptop from the main phone (open Linked devices in the app).
Sign every reply with a first name: “Amaka at Baobab Foods”.
Give each rep a label in the app and tag every chat with its owner.
Keep stage, value and next step outside the chat. A sales pipeline template in Excel is enough at this size.
When a rep leaves, remove their device the same day.

Meta’s documentation says messages sent from the Business app are free. The 24-hour rule and message templates sit under the Platform-specific terms of WhatsApp’s Business messaging policy, so they do not apply to the app.

Option 2: coexistence (app and API on the same number)

Coexistence connects your existing Business app number to the API while the app keeps working on your phone. Meta’s developer page calls it onboarding WhatsApp Business app users. You do it through a provider that supports it, and the app must be version 2.24.17 or higher.

Messages are mirrored between the two, so the owner can keep replying from the phone while the team works in a shared inbox.

What changes when you connect, according to Meta’s page:

Group chats are not synchronised to the API side. They stay in the app.
Broadcast lists are disabled and become read-only.
Disappearing messages, view once messages and live location are switched off.
All linked devices are unlinked. You can link supported ones again afterwards.
You choose whether to share chat history. One-to-one chats from the most recent 6 months can sync.
Messages sent from the app stay free. Messages sent through the API follow API pricing.

Keep using the app on the main phone. Meta lists a main device that is inactive for about 14 days as a reason the API connection is removed.

Meta’s page does not list supported countries, so ask your provider to confirm coexistence for your country code.

Option 3: a shared inbox on the API

The Cloud API is hosted by Meta. It is a connection for software, so your team works in a provider’s tool built on top of it: a shared inbox or a CRM.

That software gives a sales team what the app lacks. Each rep has a login, each conversation has an owner and the manager sees activity per rep.

The API also brings the Platform rules in WhatsApp’s Business messaging policy. You can reply in your own words for 24 hours after a customer’s last message. After that you need an approved template and the customer’s opt-in. Our guide to the WhatsApp 24-hour rule for sales teams covers this in full.

Without coexistence, the number leaves the app. Meta’s phone number requirements say a number already in use on WhatsApp or the Business app cannot be registered until that account is deleted.

The three options side by side

	Linked devices on the app	Coexistence	Shared inbox on the API
Suits	2 to 3 reps in one room	An owner who wants to keep the app	Teams that need owners, cover and reports
Lead owner	By agreement (labels, signed replies)	Assigned in the inbox	Assigned in the inbox
24-hour rule and templates	No	Yes, for API messages	Yes
Groups and broadcast lists	Available	Groups in the app only. Broadcast lists disabled	Messages to many contacts go out as approved templates, to people who opted in
Meta message charges	None	App messages free, API messages follow API pricing	Templates charged per message. For replies, see “What it costs”
Chat history	Stays on the phone	Kept. Last 6 months can sync	Lost unless backed up first

To find where leads go missing today, run The Lead Leak Audit. It is 25 checks, takes about 20 minutes and is one of the free tools on the Socianet site.

Assign leads, not chats

A chat is a thread of messages. A lead is a person or company with an owner, a stage, a value and a next step. Whichever option you choose, agree these five rules:

One owner from the first reply. Share leads out in turn, by territory or by who is on shift.
Every reply carries a name. The next person sees who said what without asking.
Cover is named in advance. When Sam is off, Tolu replies to Sam’s leads. The owner does not change.
Leavers hand over before their last day. Reassign every open lead in one sitting, so the history stays with the lead.
The manager checks three numbers each week. Time to first reply, leads with no next step and leads per rep at each stage.

If your stages are not written down yet, start with sales pipeline stages for small teams. The three numbers fit into a 30-minute pipeline review.

What it costs

The software

Linked devices cost nothing extra. Shared inbox tools and CRMs charge either per user or one price for the team. Work out a year’s total for your headcount.

Meta’s message charges (API only)

Meta has charged per message since 1 July 2025. Rates for template messages vary by category, volume tier and country.

Meta’s page on pricing for non-template messages says ordinary replies inside the 24-hour window are charged too from 1 October 2026, at the same rate as utility and authentication messages in each market. On that page’s terms, a sales chat with 20 replies from your side is 20 charges.

Meta’s pages do not fully agree yet. On 2 October 2026 the main pricing page still said “All non-template messages are free”, and the WhatsApp Business pricing page still described service messages as not charged. Budget for the charge until your WhatsApp provider confirms otherwise, ask for its rate card and check your first October invoice.

Both developer pages say messages inside the 72-hour free entry point window stay free. The main pricing page says that window opens when a lead from a Click to WhatsApp ad messages you and you reply within 24 hours.

We have not printed rates because they vary by market. The current rate cards are on Meta’s pricing page.

Moving your number across

You keep the same number on both routes. The chat history differs.

With coexistence, Meta says you can use the app and your provider’s software together and your messaging history is preserved.
With a full move, you delete the account in the app first. Meta says the history is lost and tells you to back up your chats before you start.

Before the move:

Export or back up the chats you need.
List what the team uses in the app today: groups, broadcast lists, labels.
Collect opt-in from the contacts you plan to message first.
Submit your follow-up templates. Meta says review can take up to 24 hours.

Allow a few days for Meta’s checks on your business and display name. The pages we opened give no fixed time. A newly created business account also starts with a messaging limit of 250 unique contacts in a moving 24 hours for messages sent outside the reply window, so do not plan a large first-day announcement.

Frequently asked questions

How many people can use one WhatsApp account?

On the WhatsApp Business app, one main phone plus up to four additional linked devices. On the API, each person logs in to the inbox software, and the number of users depends on that software.

Can you share a WhatsApp Business account?

Yes. WhatsApp’s own announcement describes employees replying to customers from their phones under the same Business account. Everyone shares one inbox, so agree who owns which lead.

How do I use one WhatsApp number on two phones?

Keep the account on the main phone and link the second phone as an additional device. On the main phone, open Linked devices in the app and follow the steps.

Can WhatsApp Business be used on multiple devices?

Yes, on up to four additional devices alongside the main phone. WhatsApp’s Business app features page says a Meta Verified business can link up to 10 devices and agents (checked on 2 October 2026).

Will we lose our chat history if we move to the API?

With coexistence, no. The last 6 months of one-to-one chats can also sync to your provider. With a full move, the history in the app is lost unless you back it up first.

Get a second opinion on your setup

Socianet is a CRM with one shared inbox for WhatsApp, SMS, email, Instagram and Facebook messages, where every lead has an owner and a next step. It is one flat monthly price with every seat included, from £197 a month excluding VAT plus a one-off setup fee, with messaging billed as used. WhatsApp goes live once Meta approves the business number, which can add a few days.

To talk it through, book the free 30-minute pipeline audit. Bring your current setup and ask which of the three options fits. The advice is yours to keep, whether or not you use Socianet.

Book a free pipeline audit

Sources

Patrick Nwafor

Patrick Nwafor is Chief Marketing Officer at Socianet, the CRM for growing sales teams. He has worked on lead generation, event registration and digital campaigns since 2016, for organisations including Africa’s Young Entrepreneurs, Dr Clear Aligners UK and the Inshort Film Festival.

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