WhatsApp Coexistence: the app and the API on the same number.
Coexistence is Meta's mode that keeps your number on the WhatsApp Business app and runs it on the Cloud API at the same time, through a partner platform. The owner stays on the app. The team answers from the platform. Messages are mirrored between the two.
7 days free, no card
WhatsApp channel in Nexus with coexistence on (Coex) and the Deactivate Coex button. The product interface is in Portuguese.
1,000+ companies on the official WhatsApp
How it works
One number, two places to answer.
The business does the onboarding with the account and number it already has on the app, and keeps using the app while the platform answers through the API. What the owner sends from the app also reaches the platform.
WhatsApp Business app
Stays live on the same number. Groups, calls and catalog stay in the app.
WhatsApp Cloud API
Mirrors messages between the app and the partner platform.
Chatsac Nexus
Chatsac's platform, a Meta Tech Provider, answers through the API.
Same number
Meta converts the account you already have into one compatible with the previous account. The account ID stays the same.
History, if you allow it
Meta lets you sync 1:1 conversations from the last 6 months, without groups. You can decline. What shows up in your account depends on the platform.
Owner on the app, team on the platform
Coexistence is for those who want to keep the owner on the app and the team on the platform.
Which model fits you
Coexistence isn't for everyone. That's fine.
You answer alone or as a pair
If the WhatsApp Business app already handles your volume, you don't need a platform.
The owner wants the app. The team wants the platform.
You want the team on the platform without taking the owner off the app, and you accept the limits Meta sets for this mode.
This page is for this case
You need what coexistence doesn't cover
You need more than 20 messages per second, or features Meta leaves unsupported on the API in this mode, such as catalog and marketing messages.
Want the API without the app? See the official WhatsApp API.
How to activate
Activating coexistence in Chatsac, in six steps.
- 1
Open the WhatsApp channel
Use a WhatsApp channel already connected in Chatsac.
- 2
Click Ativar Coex
It's the button on the channel (Activate Coex; the product interface is in Portuguese).
- 3
Read the on-screen notices
Before continuing, check what changes.
- 4
Follow the instructions
They lead to Meta's flow.
- 5
Authorize the same number
In Meta's flow, authorize the number that is on the app.
- 6
Check the channel
On the channel screen, confirm that coexistence is active.
Meta's requirements
- WhatsApp Business app version 2.24.17 or higher
- A Meta Solution Partner or Tech Provider platform (Chatsac is a Tech Provider)
- Cloud API use, with webhooks handled
- The owner's phone at hand: Meta asks for a verification code or the QR code
On the phone, Meta asks for the app's number and sends a code, and the app receives a message from the official account. Tap Connect and then Confirm. On that screen you choose whether to share the history. If in doubt, talk to the team before activating.
What changes
What stays in the app and what runs through the API.
Meta defines this, not the platform. Check before activating. In the app, broadcast lists become read-only, and disappearing messages, view-once and live location are turned off in 1:1 chats. Meta supports up to 4 linked devices, except WhatsApp for Windows and WearOS, and onboarding unlinks the ones that were already linked.
| Feature | In the app after coex | On the API, via the platform |
|---|---|---|
| 1:1 conversations | Continue. Editing and revoking messages become supported. | Yes, mirrored |
| Contacts and history | Stay in the app. | Yes, if you allow it |
| Groups | Stay in the app. | No |
| Voice and video calls | Stay in the app. | No |
| Catalog, orders and status | Stay in the app. | No |
| Marketing, greeting and away messages, quick replies and labels | Stay in the app. | No |
| Business profile editing and channels | Stay in the app. | No |
20 messages per second
Fixed throughput for a coexistence number, set by Meta.
About 14 days without opening the app
If the primary device stays inactive, Meta disconnects the API. You can redo the onboarding and keep the account.
24-hour window only on the API
A message sent from the app neither opens nor extends the window. A message received shortly before onboarding can only be answered with a template.
History: one shot
Sync must start within 24 hours of activation, and the request can only be made once.
What it costs
Meta charges for the API. Chatsac charges for the platform.
Starter plan, list price per user/month on the 6-month cycle, verified on August 31, 2026. Chatsac doesn't resell conversations or add a margin on top of Meta's price. See the Starter, Growth and Scale plans at /precos.
Keep reading
Read before you activate.
Try Nexus free for 7 days, no card.
What is WhatsApp Coexistence?
It's Meta's mode where the same number works at the same time on the WhatsApp Business app and on the Cloud API, through a partner platform. Messages are mirrored between the app and the platform.
Do I have to change numbers or uninstall the app?
No. The business does the onboarding with the account and number it already has on the app and keeps using the app. Meta converts the existing account into one compatible with the previous account, and the account ID stays the same.
What are the requirements?
Meta lists four: WhatsApp Business app version 2.24.17 or higher, a platform that is a Meta Solution Partner or Tech Provider, Cloud API use, and webhooks handled. Chatsac is a Meta Tech Provider.
Does the conversation history come along?
Meta lets you sync 1:1 conversations from the last 6 months, without groups, and you can decline. Sync must start within 24 hours of activation and the request can only be made once. What shows up in your account depends on the platform, so confirm with the team before activating.
What stops working?
Meta lists as unsupported on the Cloud API: groups, voice and video calls, catalog, orders and status, message tools (marketing, greeting, away messages, quick replies and labels), business profile editing and channels. Those features stay in the app. In the app, broadcast lists become read-only.
What is the message limit?
While coexistence is active, Meta fixes the number's throughput at 20 messages per second. Check that this fits your operation before activating.
Can coexistence disconnect on its own?
Yes. Meta disconnects the number from the API when the primary device stays inactive for about 14 days. A companion device inactive for about 30 days also causes a disconnect, as does switching devices or registering the app again. Afterwards you can redo the onboarding and keep the same WhatsApp account.
How do I activate and deactivate it in Chatsac?
Activation starts from an already connected WhatsApp channel, with the Ativar Coex button. Then you authorize the same number in Meta's flow. To deactivate, use the option on the channel itself.
How much does it cost?
Meta says messages sent from the app stay free and messages sent through the Cloud API follow Cloud API pricing. Chatsac charges for the platform, from $25 per user/month on Starter (list price, 6-month cycle).
Is there a free trial?
Nexus has 7 days free, no card. If you want to activate coexistence on your number, talk to the team first.
Do I need a new WhatsApp number?
No. You use the same number, now on the Official Meta API.
Is it official? Can my number be banned?
Yes, we are a Tech Provider on the Official Meta API. No platform promises immunity: Meta enforces the policy. On the official API you operate authorized and see the number quality.