Keep your existing number.
Ready in minutes.
Continue using your WhatsApp Business App while unlocking the full power of the Business API. No number change. No history loss. Both can run at the same time.
- Same phone number, same chats, same contacts
- Use both app and API simultaneously
- Setup in under 5 minutes with QR scan
- Messages sync automatically between platforms
What is WhatsApp Coexistence?
Meta's "Coexistence" feature lets your WhatsApp Business App and the WhatsApp Business API run side-by-side on the same number — your team can answer from the app on their phone while automations, AI replies and team-inbox features run on the Wassenger platform.
Why use WhatsApp Coexistence?
Three concrete scenarios where running both at once pays off.
Multi-device for the team
Your team answers customers from desktops during the day. The owner answers from the phone in the evening. Every message stays in sync across all the surfaces.
Mobile + advanced automations
Keep typing replies on your phone like always, but layer AI auto-replies, schedules and chatbots on top via the Wassenger platform — same number.
Zero migration risk
No number port, no chat-history loss, no customer notification. If it ever stops working for you, just disconnect — your app keeps running like nothing happened.
Setup in 3 simple steps.
Connect your WhatsApp Business App in under 5 minutes.
Create your account
Sign up for free and access your dashboard. No credit card required for the 7-day trial.
Scan the QR code
Open the WhatsApp Business App on your phone → Settings → Linked Devices → scan the QR shown on screen.
Start using both
Your number is now connected. Use the mobile app and the API platform simultaneously — messages sync everywhere.
Feature comparison
What you can do with each platform.
| Feature | Business App | Wassenger Coexistence |
|---|---|---|
| Send & receive messages | ✓ | ✓ |
| Multi-device for the team (5+ agents) | — | ✓ |
| AI Assistant + auto-replies | — | ✓ |
| Campaigns & broadcast lists 1k+ | — | ✓ |
| REST API + webhooks | — | ✓ |
| No-code flows + chatbot | — | ✓ |
| Chat from your phone | ✓ | ✓ |
| Keep existing chats & contacts | ✓ | ✓ |
Important information
What you need to know before getting started.
Requirements
- WhatsApp Business App v2.24.17+
- Active WhatsApp Business number
- Smartphone with internet connection
Pricing
- Messages from Business App: Free
- Wassenger from €29/mo · 7-day trial
- No setup fees, cancel anytime
Limits
- 5 messages / second via API (coexistence mode)
- Unlimited messages from the phone app
- Migrate to dedicated API for higher throughput later
Frequently Asked Questions
Common questions about WhatsApp Coexistence.
Will I lose my existing chats and contacts?
Can I still use my phone to send messages?
How do I disconnect my number if needed?
What happens to messages I send from the mobile app?
Is there a message limit?
Keep your number. Add the API.
Five minutes. No port. No history loss. No new number to memorise. Just better tooling on the same WhatsApp.
Want to migrate later?
Start with coexistence today. When you need a dedicated API number, we move you over in one call — no downtime.