WhatsApp Shared Inbox: How to Build One Inbox the Whole Team Works From

Businesses that want a "WhatsApp shared inbox" are usually trying to stop working from a single phone, screenshots, or internal group chats. The goal is one inbox every agent can continue from without asking who last spoke to the customer or what was promised.

Last updated June 20, 2026

One inbox for all agents

Assignment and notes inside the conversation

Full history visible to the team

Short answer

A WhatsApp shared inbox connects one business number to a single workspace where every agent signs in with their own login, each chat is assigned to one owner, and the history stays with the number instead of a personal phone. Unlike linked devices in the app, which cap at the primary phone plus up to 4 (or up to 10 with Meta Verified) and give everyone identical access, a shared inbox built on the WhatsApp Business API is not tied to linked devices, so the number of agents is set by your plan, and it adds assignment, internal notes, statuses, and reporting. With coexistence the number keeps working in your WhatsApp Business app at the same time.

Product Proof

What This Looks Like In The Product

Real screenshots from the live marv.Inbox workspace. marv.Inbox is also available in Hebrew and Arabic.

marv.Inbox shared inbox workspace screenshot — Shared inbox view with ownership, tags, status, and internal collaboration inside the conversation.

marv.Inbox contacts and customer record screenshot — Shared customer record with contact details, status, and conversation history visible to the team.

marv.Inbox live monitor and SLA dashboard screenshot — Live queue monitor showing open load, unassigned work, and SLA risk for managers.

Why teams search for this

Why one shared number stops scaling

The pain usually starts when conversations come into the same number but are handled in parallel by different people, each from a different device or with manual handoffs outside the system.

▲Conversation history lives on the last agent's phone.
▲Handoffs happen in an internal WhatsApp group or over the phone, not inside the workflow.
▲It is hard to see what is open, what is waiting, and who should respond next.

Shared inbox vs sharing the WhatsApp account: what is the difference?

Sharing the WhatsApp account means several people sign into the same number, through linked devices in the free app or one shared login. Everyone sees the same chat list with the same access, which is fine for two people on light volume but keeps no record of who replied and gives no way to assign work.

A shared inbox is the operational layer on top of that number. The account is still one number, but each agent has their own login, every conversation is assigned to a single owner, and a manager can see what is open and who is holding it. If your question is really about access limits and whether the account can be shared at all, the device caps are covered in our guide to whether multiple users can use WhatsApp Business.

Read the full breakdown of WhatsApp Business user limits

Is a WhatsApp shared inbox free, and how do you set one up?

The WhatsApp Business app itself is free, and linking a second device costs nothing, so two people can share one number at no charge. What the free app does not include is a real shared inbox: assignment, separate logins, internal notes, and reporting all live in software built on the WhatsApp Business API, which is a paid layer.

Setup is short. Connect the business number to the inbox, with coexistence it keeps running in your WhatsApp Business app, invite each teammate so they get their own login and role, then set assignment rules so every new chat lands with one owner. From there you add statuses, notes, and reports as the team grows.

Sources, checked June 2026

Comparison

One shared phone with the WhatsApp app

Feature	marv.Inbox	One shared phone with the WhatsApp app
Where conversations live	In one team inbox tied to the number, visible to every agent their role allows.	On whichever phone or linked device handled the chat last.
Who answers a chat	Each conversation is assigned to one owner, with a status and a handoff path.	Anyone on any device, with no claim, no owner, and shared read state.
Agent logins	Each agent has their own login and role, so every reply is traceable to a person.	One shared login, or up to 4 linked devices, all identical and anonymous.
Internal notes	Notes and mentions sit on the chat and stay invisible to the customer.	None. Coordination moves to a side group or a phone call.
Handoff	Reassign inside the inbox with the full thread and context intact.	Forward a screenshot or explain it out loud, and hope nothing is lost.
Manager view	Live queue depth, response times, and load per agent.	None. The manager asks the team what is still open.
When an agent leaves	Their chats, notes, and history stay with the number and get reassigned.	Unlink the device, and what they knew about open chats leaves too.

Workflow

How a good shared inbox works

All conversations arrive in a single view that the whole team sees.

Agents assign ownership, leave notes, and hand off with the full thread intact.

The manager sees response times, load, and stuck conversations from the same screen.

What the better setup should include

What to require from any solution

One view per customer

Every agent who opens a conversation sees the same history, status, and next steps.

Real collaboration

Internal notes, assignment, and handoff happen inside the inbox, not outside it.

Visible follow-up

Easily see which conversations need a reply, who holds each one, and what is at risk.

Best fit

Who this fits best

✓Support or sales teams that continue each other's conversations throughout the day.
✓Businesses with many returning customers that need treatment continuity.
✓Organizations that need a shared inbox, not just the ability to log in to the same account.

Questions teams ask before changing the workflow

What is a WhatsApp shared inbox?+

A WhatsApp shared inbox is a team workspace where multiple agents handle the same WhatsApp number with shared history, assignment, internal notes, statuses, and a live queue view for leads and admins.

How many agents can use a WhatsApp shared inbox?+

There is no fixed limit. A shared inbox runs on the WhatsApp Business API, which removes the linked-device cap of the free app, so the number of agents is set by your plan, not by WhatsApp. Each agent works under their own login.

Is a WhatsApp shared inbox the same as a shared WhatsApp account?+

No. A shared account is shared access to one number. A shared inbox adds the workflow on top: one owner per chat, internal notes, handoff history, and manager reporting, so shared access turns into organized teamwork.

Does a shared inbox stop WhatsApp working on my phone?+

No. With coexistence the same number runs in your WhatsApp Business app and in the shared inbox at once. Quick replies on the go still work, while the team handles the queue from the inbox.

What should a WhatsApp shared inbox include for support teams?+

At minimum: assignment, a visible owner per chat, internal notes, handoff history, queue views, SLA alerts, and reporting that shows what is waiting or at risk.

Can sales and support use the same WhatsApp shared inbox?+

Yes, if the tool supports routing and queue separation. The same number can receive both lead and support conversations while still assigning them to the right team.

Why is a shared inbox better than sharing the account login?+

Because login sharing gives access but not accountability. A proper shared inbox makes ownership, follow-up, and queue accountability part of the workflow itself.

See whether this workflow fits your team

Explore the product, then request a walkthrough if you want help mapping channels, ownership, automation, or rollout.

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