The free WhatsApp Business app already does multi-device. So what is a shared inbox for?
Last updated 8 November 2026
Published 8 November 2026.
A fair question, and the platforms selling shared inboxes mostly answer it badly, because the honest answer starts with "for a lot of you, nothing".
WhatsApp Business is free. It runs on four linked devices. Two people really can answer the same number from two phones. If you are one person, or two people who sit near each other and talk, that is the right tool and you should keep it.
Four things break at the next step. None of them is about features.
1. Nobody knows who replied
Everyone is signed in to the same account, so every message says it came from the business. There is no name on it.
That is fine until a customer says "the person I spoke to on Tuesday promised me a discount" and three people say it was not them. It is fine until somebody quotes a price that was not approved and nobody can tell who. It is fine until you want to know whether your new hire is actually answering anybody.
A shared inbox gives each person their own login, so every reply carries a name. That is the whole of it, and it is the one that costs you most while you do not have it.
2. Nobody owns a conversation
Two people open the app. Both see Ahmed waiting. Both answer. Ahmed gets two different replies, sometimes contradicting each other.
Or the opposite, which is worse: both of them see Ahmed, both assume the other one has it, and Ahmed waits two days.
The fix is a name on the conversation. One person owns it, everyone else can see that, and there is a list of the ones nobody has picked up. That is assignment, and it is the single feature that separates a shared inbox from a shared login.
3. The history lives on one phone
In the free app, the conversation history is on the primary device. Linked devices sync recent messages; they are not an archive.
So "what did we agree with this customer in June" is a question only one phone can answer, and only if that phone still has the chat and still works.
4. It leaves when that person leaves
This is the one that actually costs money, and it is the reason most businesses eventually move.
The salesperson who handled your biggest accounts for two years resigns. Their phone was the primary device. Every conversation with every one of those customers was on it. You get the phone back if you are lucky and it is wiped if you are not, and either way the person who replaces them starts from nothing.
A shared inbox keeps the history against the business rather than against a handset. Somebody leaving removes their login and nothing else.
What it costs to fix
The market for this sits between $15 and $79 a seat a month. On 8 November 2026, Respond.io published $79, Wati published $49, and ours is $15. TimelinesAI, Trengo and several others sit in between.
Per seat is the normal shape, and it is worth understanding why: the cost of running a shared inbox barely moves with the number of people in it, so per-seat pricing is about what the product is worth to you rather than what it costs to run. Which means the price is negotiable in a way per-message pricing is not.
What you give up
Honestly, some things.
The free app is on your phone and a shared inbox is usually in a browser, so replying while walking around a shop floor is worse unless the product has a decent mobile view. Ours has a mobile layout; it does not have a native app.
You also need a number that is not already on WhatsApp, because connecting to Meta's Cloud API takes the number out of the app. Most businesses get a new line for it, which also means your personal WhatsApp keeps working.
And there is a per-message fee from Meta on WhatsApp that the free app does not have: the first 1,000 service messages per number per month are free, then Meta's utility rate for your customer's country. That is billed to you by Meta directly, and anybody who tells you they absorb it is marking it up somewhere else.
The test
If you are one person, stay on the free app.
If two or more people answer the same WhatsApp number and you have ever had to ask "did somebody reply to this", you have the problem a shared inbox solves. Everything else on the feature list is secondary.
Ours is $15 a seat with the owner's seat free, and it covers Messenger and Instagram in the same list.
Questions
Can I keep my existing WhatsApp number? Only if it is not currently on WhatsApp or WhatsApp Business. Connecting a number to the Cloud API takes it out of the app, so most businesses use a new line and keep the old one personal.
Do I need the AI? No. A shared inbox and an AI assistant are different products and ours are priced separately. Plenty of businesses want their own people answering and only want to know who answered what.
How many seats do I need? One per person who answers customers. The owner's seat is usually included; check, because not everybody includes it.
Does it work on a phone? In a browser, yes. Ask specifically about the mobile experience before you buy, because this is the thing shared inboxes are worst at and the thing the free app is best at.
What happens to my old conversations? They do not come across. Meta does not provide a way to export WhatsApp history into the Cloud API, so a shared inbox starts from the day you connect. Plan for an overlap rather than a cutover.
Is a shared inbox the same as a CRM? No. A shared inbox is where conversations happen. A CRM is where the record of a customer lives. Some tools do both badly; most businesses are better off connecting the two.