Most growing businesses reach the same point: WhatsApp runs on one phone, Instagram on another, Messenger on someone's laptop, and customers wait while the one person with access is busy. A shared team inbox fixes that. This guide covers what you need, how to set it up, and the few rules that keep a shared inbox tidy.

What "shared inbox" really means

A shared inbox is one screen where several people read and answer messages from all your channels. Each conversation has a status (open, waiting, resolved) and an owner. Anyone on the team can see the history, so a colleague can pick up where someone else left off. For the short definition, see What is a unified inbox?

What you need before you start

  • WhatsApp Business API for each number you want to share. The WhatsApp Business phone app works on one device; the API is what lets a whole team use a number through software.
  • A Facebook page (for Messenger) and an Instagram professional account linked to it.
  • Admin access to your Meta business account to approve the connection.
  • A list of who should handle what — by channel, branch, language or product.

Setup, step by step

  1. Connect the channels. In your inbox tool, log in with Meta and choose the WhatsApp number, Facebook page and Instagram account to connect. Add your email inbox if customers also write by email.
  2. Add your team. Invite each person and decide which channels they work on.
  3. Choose an assignment rule. Round-robin shares new conversations fairly; a single owner suits a channel dedicated to one person; a shared queue lets the first free person take the next chat.
  4. Set privacy rules. Decide who may see every conversation and who sees only their own, and whether customer phone numbers should be masked for some roles.
  5. Build your quick replies. Save the ten answers you send most often — opening hours, location, prices, payment options.
  6. Prepare WhatsApp templates. Any message you start after the 24-hour window must be an approved template, so submit the common ones early.

Team rules that keep the inbox clean

  • One owner per conversation. If you are not the owner, pass the question to them instead of replying yourself.
  • Close the loop. Mark conversations resolved when they are done, so "open" always means "needs attention".
  • Next step before you leave. For sales conversations, set a follow-up date on the lead before moving on.
  • No personal numbers. Customers should always reach the business number, so history stays with the company.

Doing it in Lead10

In Lead10, WhatsApp (via Meta's official WhatsApp Business API), Instagram, Messenger and email arrive in one real-time inbox. Each channel has its own team and assignment rule — round-robin, one agent, or a shared queue. Conversations can be assigned and marked open, waiting, resolved or closed; agents use quick replies, slash commands and Meta-approved templates; phone numbers can be masked for staff without permission; and agents see only their assigned chats unless allowed to see all. New contacts become leads automatically, so the inbox feeds straight into your pipeline.

See the unified inbox for the full feature list, or how to manage WhatsApp, Instagram and Messenger messages in one place.