The question arrives in a dozen phrasings: can two people use one WhatsApp Business number, can it be on multiple phones, can several users share one account. The short answer is yes, WhatsApp itself allows it, up to a point, and the point is exactly where most teams get into trouble.
This guide covers what WhatsApp gives you out of the box, why four linked screens is not the same as a team, and the two routes that actually work when more than one person answers customers.
What WhatsApp allows out of the box
One phone owns the number. Everything else is a linked device: WhatsApp Web in a browser, the desktop app, or a business tool that keeps a linked session open. You can link up to four companion devices to one account, and since WhatsApp moved to multi-device, a linked device keeps working even when the phone is offline.
That is genuinely useful for one person on two screens. It is the whole of what WhatsApp offers for "multiple users", and it was designed for one person.
- 1
Open linked devices on the phone
In WhatsApp or WhatsApp Business: the three-dot menu on Android or Settings on iPhone, then Linked devices.
- 2
Link a device
Tap Link a device and scan the QR code shown by WhatsApp Web, the desktop app or the tool you are connecting.
- 3
Repeat, up to four
Each linked screen takes one of the four companion slots. A fifth link needs one of the four to be removed first.
Related: WhatsApp Web for business: login, linked devices, limits · WhatsApp QR codes and linked devices, explained
Why four linked screens is not a team
Give four colleagues the four slots and every one of them is the business, in full. Each sees every conversation. Nobody is assigned anything, so two people answer the same customer or nobody does. There is no record of which person wrote which reply, because to WhatsApp they are all the same account. And there is no way to give a new hire the customers they should see and keep them out of the ones they should not.
None of that is a bug. Linked devices are one identity on several screens. A team needs the opposite: one number, several identities, and rules about who may do what.
- Everyone sees everything; nothing can be restricted to a person.
- No assignment, so no ownership of a conversation.
- No record of who replied.
- Four slots, and a business tool you connect takes one of them.
Route one: a team inbox on the number you already use
A team inbox connects to your number as a single linked device and puts the team on its own side of that link. The phone keeps working exactly as before, and messages sent from the phone appear in the inbox and vice versa. Behind the one link, each teammate has their own login, an owner can restrict a person to specific conversations or customers, chats are assigned, and every reply is recorded against the person who sent it.
This is how Spun works. It occupies one of the four companion slots on your number, and behind it team members are unlimited, with clear rules about who may do what. Nothing is applied for, no templates are approved, and there are no per-message fees, because nothing goes through the API.
The trade, stated plainly: a linked device is a live session, not a permanent registration, and WhatsApp has rules about it. If the session drops, someone scans again. There are no pre-approved templates and no official bulk-sending allowance either.
Related: Shared Team Inbox: one number, a whole team, clear rules · How Spun connects to WhatsApp
Route two: the WhatsApp Business API
The official API is multi-user by design, but it is a different product. It means an application, a business verification, usually a dedicated number rather than the one you already use, message templates that need approving, and a bill that moves with your volume through Meta's per-message fees. For a business sending large volumes of template notifications it is the right lane. For a team that mainly answers customers from a number they already have, it is a great deal of process for a problem the first route solves in an afternoon.
Which one you need
| Linked devices only | Team inbox on your number | Business API | |
|---|---|---|---|
| Users | One identity on up to four screens | Unlimited, each with their own login | Multi-agent by design |
| Your existing number | Yes | Yes | Usually a dedicated number |
| Roles and restrictions | None | Per person | Per platform |
| Cost model | Free | Flat monthly | Subscription plus per-message fees |
| Templates and approvals | None | None | Required for business-initiated messages |
| Best for | One person, two screens | A team answering customers from one number | High-volume notifications |