How many users can the WhatsApp Business app have?
In the WhatsApp Business app, one number lives on one main phone. You can link up to four more devices to it, such as WhatsApp Web on office computers. Every linked device is the same account, not a separate user.
Meta's help centre says businesses with a Meta Verified subscription can use multi-agent and connect up to ten devices. Everyone still works inside one shared account.
The main phone matters. You need it to link new devices, and if it is not used for more than 14 days, the linked devices are logged out.
Device limits from the WhatsApp Help Center, checked 29 Oct 2026.
Where linked devices stop working for a team
- Nobody owns a chat. Two people can answer the same customer, or both can assume the other one did.
- There is no record of which staff member sent which reply.
- You cannot limit what a new or part-time staff member sees. Every device sees every chat.
- When someone leaves, you have to remember to unlink their device.
- Device limits cap the team at a handful of people.
Roles: who can do what
If you run more than one number, you can also choose which team members may see or answer each number.
| Role | What they can do |
|---|---|
| Owner | Everything, including adding and removing owners. |
| Admin | All settings, billing and campaigns. Sees every chat. Can be given chats. |
| Agent | Replies to chats given to them and sees only those. No settings. |
| Viewer | Can look at chats given to them but cannot reply. Never given chats. |
Chat sharing and assignment
Under Settings, Chat sharing, you decide who is given new chats. Put people into teams such as Sales or Support, or share new chats among everyone.
Each team hands out chats in turn (round robin), to the person with the fewest open chats, or not at all, so an admin assigns them by hand. A chat is claimed once, so it never ends up with two owners.
- Hand a chat to a colleague when it needs someone else.
- Internal notes that the customer never sees.
- Quick replies, labels, resolve and snooze on every thread.
- Business hours and reply targets, per workspace or per team.
Keep using the WhatsApp Business app on the same number
You do not have to give up the phone app. On eligible numbers, Meta's Coexistence mode keeps the WhatsApp Business app working on the same number while your team replies from Chatzyn. New messages show in both the app and Chatzyn.
A personal WhatsApp account cannot be connected. Move the number to the free WhatsApp Business app first; your chats are kept.
Replies to customers who wrote to you are service messages. Meta gives each business number 1,000 free service messages a month, then charges a small per-message rate. See the WhatsApp API pricing page for current rates.
Questions people ask
Can two people use the same WhatsApp Business number?
Yes. The WhatsApp Business app allows the main phone plus up to four linked devices on one account. A shared inbox on the WhatsApp Business Platform lets more people reply from the number, each with their own login.
How many devices can use one WhatsApp Business account?
The app allows one main phone and up to four linked devices. Meta's help centre says Meta Verified businesses can connect up to ten devices with multi-agent.
Can I give each employee their own login for WhatsApp Business?
Not in the app, where every device is the same account. In a shared inbox such as Chatzyn, each employee signs in with their own email and gets a role: owner, admin, agent or viewer.
Can I see which agent replied to a customer?
Yes, in a shared inbox. Each chat has an owner, and Chatzyn records which team member sent each reply instead of one shared account.
Will I lose the WhatsApp Business app on my phone if I connect a shared inbox?
Not on numbers eligible for Coexistence. The app keeps working on the same number and new messages show in both the app and Chatzyn.
Can agents reply from their phones?
Yes. Agents can use the Chatzyn app for Android or iPhone, or the dashboard in a mobile browser, with their own login.
Why did my linked devices log out?
WhatsApp logs out linked devices if the main phone has not been used for more than 14 days. Open WhatsApp on the main phone and link them again.