A small online shop rarely sells on one app. Buyers find you on Instagram, ask questions on WhatsApp, reply to a TikTok video and message your Facebook Page. Each app has its own inbox, its own notifications and its own rules about when you can reply. Switching between four apps all day is slow, and it is the main reason messages get missed.
This guide explains how to answer all of those messages from one place. It covers what can be connected, what each app needs from your account first, how long each app lets you reply, and how to share the work with a team without sharing passwords. The examples use Karobar's unified inbox, but the ideas apply to any shared inbox tool.
Why one inbox is worth the setup
Running each app separately causes the same three problems in almost every shop:
- You check some apps less often. WhatsApp gets answered quickly because it is on your phone all day. TikTok messages wait until someone remembers to open the app, and by then the buyer has moved on.
- The reply window runs out unnoticed. Every app limits how long a business can reply after the customer's last message. When chats are spread across four apps, nobody sees which ones are about to close.
- Work cannot be shared fairly. If one person holds the phone, that person answers everything. If several people log in to the same app, two of them answer the same customer and nobody answers the next one.
One inbox fixes all three. Every new message lands in a single list, each chat shows how much reply time is left, and each chat can belong to one named person.
What you can bring into one inbox
In Karobar, private messages come in from four channels and appear in the same chat list:
- WhatsApp chats on your business number.
- Instagram direct messages.
- Facebook Messenger chats sent to your Page.
- TikTok direct messages to your business account.
Public comments are kept apart from private chats, because they need different handling. Comments from Facebook, Instagram, TikTok and YouTube arrive in a separate comments view. There you can reply in public, hide, pin, like or delete a comment, and turn a commenter into a lead. On Facebook and Instagram you can also answer a comment with a private reply. See comments and engagement.
Google reviews have their own place too, under reputation management, so a review is never mixed up with a sales chat. The inbox also has a team tab for messages between teammates, which keeps internal talk out of customer chats.
What each app needs before you connect it
Outside tools can only read and send messages for business accounts. A personal profile cannot be connected to any shared inbox. Before you start, check each account:
- Instagram: switch the account to a professional account (business or creator) in the Instagram app. You keep your followers and posts.
- Facebook Messenger: you need a Facebook Page for the shop, and you need to be able to manage that Page.
- WhatsApp: the number has to be on WhatsApp's business platform. If you move a number over from the WhatsApp Business app, older chats come across, but messages sent before you linked the number do not open a reply window.
- TikTok: use a TikTok business account, not a personal one.
- Connect each one from the channels settings in Karobar. New messages from that account then start arriving in the shared list.
Connect one channel at a time and send yourself a test message from a personal account before moving to the next. That way, if something does not arrive, you know exactly which connection to check.
Assign every chat to one person
The rule that stops double replies is simple: every customer chat has exactly one owner at a time. In Karobar you can assign a chat in two ways:
- By hand. Open the chat and assign it to a teammate. Use this to hand a chat to the person who knows the product, or to pass a complaint to whoever handles them.
- Automatically. Switch on auto-assign under the team assignment settings. Each new customer chat then goes to the active teammate who has the fewest chats. The owner's own profile is left out, so the owner is not buried in new chats.
A team member can only send in chats assigned to them, so two people never answer the same customer with different prices. See team inbox.
Give each teammate their own login and the right access
Never share your Instagram, Facebook or WhatsApp password with staff. A shared password means you cannot tell who sent what, and you have to change it for everyone when one person leaves.
Karobar has two kinds of people in a workspace. The owner is the account holder. Team members are invited by the owner, and the owner chooses which parts of the app each one can open, module by module. A team member can also be given the right to manage other team members. So a helper who only answers chats can see the inbox and nothing else, while someone who packs orders can see orders but not your settings.
How to split the work across a team
There is no single right way to divide chats. Pick the pattern that matches how your shop actually sells:
- By shift. Turn on auto-assign and let new chats go to whoever is on duty. This suits shops where everyone can answer every question.
- By topic. One person handles new sales questions, another handles delivery problems and complaints. New chats come in to the sales person, and they reassign by hand when a chat turns into a complaint.
- By channel. One person owns TikTok and Instagram, where questions are often about a video or a post, and another owns WhatsApp, where buyers usually confirm orders.
You can also take the repeat questions off everyone's plate. Keyword inbox auto replies answer common questions like price or delivery with text you wrote, and Karobar AI writes reply drafts from your products, prices, variants, business info and knowledge, which a person reads and sends.
A daily routine for a shared inbox
| When | What to do | Why |
|---|---|---|
| Start of day | Sort the list by reply time left and answer chats that close today | Instagram, Messenger and WhatsApp count 24 hours, TikTok counts 48 |
| Start of day | Check that every unassigned chat has an owner | An unassigned chat is a chat nobody answers |
| Every hour or two | Clear your own assigned chats, sending or editing any AI drafts | Fast answers win sales |
| Through the day | Update the label and the shared note when a chat changes stage | The next person knows where it stands |
| Once a day | Go through the comments view and move buyers to private chats | Public price questions turn into private sales |
| End of day | Reassign chats from anyone who is off tomorrow | Nothing waits for someone who is not there |
When a chat turns into a sale, record the order while the conversation is open. Taking orders from Instagram DMs walks through that part step by step.
Sources
Facts about other companies and platforms come from their own pages, checked on the dates shown. Plans and prices change; check the source before you decide.
- Meta: Instagram Messaging API (professional accounts, Human Agent window) (checked 2026-10-03)
- Meta: Messenger Platform policy (24-hour window, 7-day Human Agent tag, private replies) (checked 2026-10-03)
- Meta: WhatsApp Business Platform pricing (24-hour window, free tier from 1 October 2026) (checked 2026-10-03)
- TikTok: Business Messaging API sending limits (checked 2026-10-03)
- TikTok: Business Messaging API rules (no business-started conversations) (checked 2026-10-03)