Keep Your WhatsApp Number.
Add a Full CRM Behind It.
WhatsApp Coexistence lets you connect your existing WhatsApp Business number to 3Sigma's CRM without changing numbers, losing chat history or giving up the app on your phone.
"We can't switch — customers know our number"
Vikram runs a solar panel business in Surat. His team has been using the same WhatsApp number for three years. Customers message that number. Old quote threads are there. The team is reluctant to move to a CRM because every WhatsApp CRM they looked at required a new number or wiped the chat history.
WhatsApp Coexistence solves this exactly. Vikram's existing number connects to 3Sigma. His phone still works. The chat history comes in. His team gets the shared inbox. Customers notice nothing — except faster replies.
How WhatsApp Coexistence setup works
Five steps, guided by 3Sigma. Most teams are live in under an hour.
Start onboarding in 3Sigma
Go to the WhatsApp setup in 3Sigma and click 'Connect with Coexistence'. The Meta Embedded Signup flow opens.
Log in with your Facebook Business account
Connect the Facebook Business account that owns your WhatsApp Business number. Meta verifies the account.
Select your existing number
Choose the WhatsApp Business App number you want to connect. Meta enables Coexistence on it.
Contacts and chat history sync
3Sigma pulls in your existing contacts and conversation history. Old leads land in the CRM with their full chat context.
Team inbox is live
Your number is now connected. New messages come into the 3Sigma shared inbox. The WhatsApp app on your phone still works.
What you gain with Coexistence
Everything the WhatsApp Business App can't do — without losing what you already have.
Keep your number
Customers don't need to save a new contact. Your existing number works on both the app and the API.
Chat history comes with you
Past conversations sync into 3Sigma on onboarding. No blank slate when the team picks up conversations.
App still works on your phone
Continue using WhatsApp Business App as before. The API layer adds CRM capabilities without taking away access.
Add your whole team
Once connected, unlimited agents can join the shared inbox — far beyond the 5-device limit of the app.
Broadcasts and automation
Run bulk campaigns, drip sequences and AI auto follow-up via the API — things the WhatsApp app can't do at scale.
Full CRM context on every chat
Every message is linked to a lead record with pipeline stage, call history, notes, tasks and quotations.
Before and after Coexistence
| Scenario | Before Coexistence | After Coexistence + 3Sigma |
|---|---|---|
| Your WhatsApp number | Stays the same ✓ | Stays the same ✓ |
| Chat history | Only on your phone | Synced into CRM on setup |
| Team members on same number | 5 linked devices max | Unlimited agents, assigned chats |
| Broadcasts / bulk campaigns | Very limited in app | Full broadcast suite via API |
| AI bot | None | Gemini AI bot available |
| Sales pipeline | Spreadsheet / memory | Full CRM pipeline in 3Sigma |
| Calling | Separate phone | SIM auto-dialer from same app |
Once connected, your number unlocks the full 3Sigma stack
Explore what Coexistence enables
WhatsApp CRM
The full CRM your Coexistence number connects to — pipeline, calling, invoices and AI in one place.
Shared team inbox
Multiple agents on your Coexistence number — chat assignment, filters and bulk actions.
WhatsApp CRM with calling
The only WhatsApp CRM with a SIM auto-dialer — call leads and chat on WhatsApp from one app.
Pricing
3Sigma plans from ₹0 free tier to ₹3,000/user/year. Coexistence setup is included.
WhatsApp Coexistence — common questions
What is WhatsApp Coexistence?
WhatsApp Coexistence is a Meta feature that lets you connect your existing WhatsApp Business App number to the WhatsApp Business API — without losing your current number or chat history. It means you can keep using WhatsApp on your phone exactly as before, while your CRM team also sends messages, manages the shared inbox and runs automation from the same number on the API side. 3Sigma sets this up for you via Meta Embedded Signup.
Do I have to give up my existing WhatsApp number?
No. That's the whole point of Coexistence. You keep your existing WhatsApp Business App number. You don't need to port it or lose access. Your customers don't need to save a new number.
Will I lose my old chat history?
No. When you connect via 3Sigma's Coexistence onboarding, your existing contacts and chat history are synced into 3Sigma. Your past conversations with customers come in as part of the import — so the team can see context even for leads you spoke to before joining 3Sigma.
Can I still use WhatsApp on my phone after connecting Coexistence?
Yes. The Coexistence setup is designed exactly for this scenario. You continue using the WhatsApp Business App on your phone for personal or ad-hoc messages. Meanwhile, your CRM handles the team inbox, broadcasts, automations and AI bot on the same number via the API.
What's the difference between Coexistence and a standard WhatsApp Business API connection?
A standard API connection migrates your number fully to the API — you lose access to the WhatsApp Business App on your phone. Coexistence removes that restriction. You get API access (CRM, team inbox, automation, broadcasts) while keeping the app. It's available because Meta introduced it to lower the barrier for businesses already on the app.
Does WhatsApp Coexistence work with 3Sigma's shared team inbox and AI bot?
Yes. Once connected, your Coexistence number becomes the number tied to your 3Sigma WhatsApp shared inbox. Your team assigns chats, replies, runs broadcasts, uses the AI bot and manages follow-ups — all from the CRM — on the same number your customers already know.
What does 3Sigma help with during setup?
3Sigma uses Meta Embedded Signup (FacebookIntegration) to guide you through the Coexistence connection. You log in to your Facebook Business account, connect the number and the sync starts. The team at 3Sigma helps if you hit any verification steps during WABA onboarding.
Same number. Full CRM.
Book a free demo and see how Coexistence connects your existing WhatsApp to 3Sigma — in under an hour.