WhatsApp Shared Inbox: How Teams Reply From One Number

What is a WhatsApp shared inbox?

A WhatsApp shared inbox (also called a WhatsApp team inbox) is one conversation list that several people can open at the same time. Everyone sees the same chats on the same business number, can search them, can see who is handling what, and can reply without sharing a single phone.

Most small teams start with a shared handset, which breaks the moment two customers message at once or the person holding the phone goes on leave. A shared inbox solves two basic problems: access (more than one person can answer) and ownership (it is clear who is responsible for each chat).

Can multiple people use one WhatsApp Business number?

Yes, in three ways, and they are not mutually exclusive.

1. WhatsApp's built-in linked devices. Every WhatsApp and WhatsApp Business app account lives on one primary phone and can link up to four companion devices, usually by scanning a QR code (WhatsApp Help Center). WhatsApp says this lets additional employees respond to customers from their own phones under the same account (WhatsApp Blog). Meta's paid Meta Verified subscription also lists a multi-agent option for assigning chats (Meta Verified for Business).
2. A shared inbox that links your number by QR code. The inbox becomes one of your linked devices, just like WhatsApp Web, and your team works from the inbox instead of the phone. This is how whatsappx.si connects an existing number.
3. A shared inbox built on the official WhatsApp Business Platform (Cloud API). The number is registered with Meta and messages travel through Meta's hosted API, which is not tied to a phone app (Meta for Developers).

The first option is free but has no team roles, and chat assignment on the app comes with the paid Meta Verified multi-agent option. The other two add a team layer.

QR-linked inbox vs official API inbox: which route should you take?

The honest answer is that each route trades convenience for scale.

A few facts behind the table:

• The 14-day rule. Linked devices keep working while the phone is offline, but they log out if the phone is unused for more than 14 days (WhatsApp Help Center). That applies to any QR-linked inbox too.
• Templates and the 24-hour window. On the official platform, a 24-hour customer service window opens when a user messages you. Outside it, template messages are the only kind you can send (Meta for Developers), and Meta reviews each template, which can take up to 24 hours (Template fundamentals).
• Messaging limits. New business portfolios on the platform can reach 250 unique users outside the window per rolling 24 hours, and the limit can then rise in steps to 2,000, 10,000, 100,000 or unlimited (Messaging limits).
• Coexistence. Meta's coexistence flow lets a WhatsApp Business app number run on both the app and the Cloud API, syncing up to six months of 1:1 history (Meta for Developers).

How do roles and assignment work in a shared inbox?

Access is only half the job. The other half is making sure one person owns each conversation and that people only see what they should.

Assignment means a chat is handed to a named teammate: the assignee sees it in their own view and the rest of the team can see it is taken. Unread counts and mark-as-read keep the list honest.

Roles limit what each person can do. A common pattern is three levels:

For example, a dental clinic could give front-desk staff agent access so they only see chats assigned to them, while the practice manager keeps admin rights to add numbers and tune auto-replies.

Invites should be by email with links that expire, and admins should be able to resend or revoke them.

What can automations do in a shared inbox, and what can't they?

Automations in a shared inbox are usually simpler than people expect. The two useful kinds are:

• Keyword-triggered auto-replies. A customer writes "opening hours" or "price list" and gets an instant answer, while the chat stays in the inbox for a human to follow up. You should be able to switch each rule on or off and see how often it ran.
• A shared knowledge base. You write short articles (returns policy, delivery areas, booking steps) and teammates search them for the right answer, so replies stay consistent across the team. What automations should not do is replace a person. WhatsApp's Business Messaging Policy allows automation inside the 24-hour window but requires prompt, clear and direct escalation paths to a human (WhatsApp Business Messaging Policy). Chatbot flow builders and campaign tools exist on several official-API platforms; they are a different product category from a shared inbox.

What does a shared inbox cost in 2026?

There are two separate bills to think about, and only one of them applies to QR linking.

Software fees are what the inbox vendor charges, typically per user or per plan. Check each vendor's pricing page, because they change.

Meta fees apply only to numbers on the official WhatsApp Business Platform. As of October 2026 Meta charges per delivered message, with the rate set by message category (marketing, utility, authentication, service) and the recipient's market (Meta pricing). Since October 1, 2026, service messages (free-form replies inside the 24-hour window) are charged after a free tier of 1,000 delivered service messages per business phone number per month (Meta for Developers). Messages from users to you remain free. US teams should also know that WhatsApp does not currently deliver marketing template messages to US (+1) numbers (Meta for Developers).

Meta may update rates up to quarterly, so check its rate cards rather than relying on any blog post, including this one.

What are the common pitfalls with a shared WhatsApp inbox?

• Letting the phone go idle. If the primary phone of a QR-linked number is unused for 14 days, the inbox disconnects. Keep the phone charged, online and opened regularly.
• Treating a linked device as a broadcast tool. WhatsApp states that its products are not intended for bulk or automated messaging, which has always violated its Terms of Service (WhatsApp Help Center).
• Using unofficial WhatsApp clients. Linking an account to unofficial versions of WhatsApp (GB WhatsApp, FM WhatsApp and similar) violates the terms and can lead to temporary or permanent bans (WhatsApp Help Center). A linked device through WhatsApp's own feature is different from a modified app, but the volume and opt-in rules still apply.
• No opt-in records. Meta's policy says you may only contact people who gave you their number and opted in, and you must honor opt-outs (Business Messaging Policy). Keep a record of where each contact's consent came from.
• Everyone is an admin. Give agents the narrowest role that lets them do their job.

How do you keep your WhatsApp number safe when you connect it?

This is the part most guides skip. Whether you link by QR code or use the official platform, follow these habits:

1. Season a new number first. If you created a WhatsApp account just for the business, use it normally for 15–20 days before you connect it to any software: chat with real contacts, join a group, send a few photos. A brand-new number that starts sending from software the moment it is created does not look like ordinary use, so we recommend this warm-up period.
2. Send in small batches. Send 5–10 messages at a time, pause, then continue. Never send the same message to a long list in one go. A shared inbox is for conversations, not blasts.
3. Only message people who agreed to hear from you. Reply to people who contacted you, or to customers who gave you their number and opted in. Messaging people without opt-in breaks WhatsApp's Business Messaging Policy, and WhatsApp may limit or remove access for it.
4. Keep the phone active on the official WhatsApp or WhatsApp Business app.
5. Honor opt-outs straight away. If someone asks you to stop, stop, and remove them from any outreach list.

Where does whatsappx.si fit?

whatsappx.si is a shared WhatsApp inbox for teams. You scan a QR code to connect the WhatsApp or WhatsApp Business app number you already have, and it joins the workspace as a linked device with recent chat history synced in. Your whole team then replies from one inbox at the same time, with search, assignment, unread counts, owner/admin/agent roles and expiring email invites. Keyword auto-replies work today, and a knowledge base lets teammates search your articles for answers. AI auto-replies are coming soon and are not available yet.

Two additional features sit alongside the inbox. The official WhatsApp Business Platform is a second way to connect: Meta Embedded Signup runs inside the app, several Meta numbers can share one workspace, and you can create message templates and sync them with Meta. Developers can also use a REST API and outbound webhooks.

To be clear about limits: whatsappx.si is a web app with no native mobile apps, no bulk broadcast campaigns, no chatbot flow builder and no built-in CRM integrations (other systems connect through the API and webhooks). As of October 2026, respond.io, Wati and Trengo are stronger in those areas: respond.io and Trengo bring WhatsApp, email, Instagram, Facebook and other channels into one inbox; respond.io and Wati offer broadcasts plus workflow or no-code chatbot builders; Wati and Trengo list ready-made integrations with CRMs such as HubSpot and Salesforce, and respond.io offers CRM syncing (respond.io, respond.io pricing, Wati, Trengo, Trengo pricing). All three also offer mobile access: respond.io and Wati through mobile apps, Trengo through a progressive web app (Wati mobile app, Trengo mobile). If you need a straightforward way for a small team to answer one WhatsApp number together, with the option to add official-API numbers later, that is what whatsappx.si is built for.

Which option fits your team size?

• Solo or two people, same location: WhatsApp's built-in linked devices may be enough. Add an inbox when you need to know who answered what.
• Three to fifteen people answering customers who message first: a QR-linked shared inbox on your existing number, with roles and assignment, is the quickest fit.
• Teams that must reach opted-in customers outside the 24-hour window, or that send at real volume: connect a number through the official Cloud API and use approved templates. A QR-linked number can stay in the same workspace while you transition.

Whichever you pick, write down your opt-in process, keep sends small and personal, and keep the phone active.

WhatsApp is a trademark of Meta Platforms, Inc. whatsappx.si is independent and not affiliated with or endorsed by WhatsApp or Meta.