- Cloud API — a brand-new number dedicated only to ChatSyncs. It stops working in the regular WhatsApp app once connected.
- Coexistence — your existing number keeps working in the WhatsApp Business App on your phone and in ChatSyncs, at the same time.
Start with one question: is there already a number in use?
1
No — this is a brand-new number
Use How to Connect Your Number to ChatSyncs — a fresh number just
for ChatSyncs. Fastest setup, no Meta app to create by hand. The only tradeoff: once
connected, that number can no longer be used in the regular WhatsApp or WhatsApp Business
app.
2
Yes — it's on the WhatsApp Business App, and I want to keep using both
Use How to Connect Your WhatsApp Business App to ChatSyncs — the number keeps working on the
phone’s Business App and in ChatSyncs at the same time. No downtime, no lost history.
3
Yes — it's on personal WhatsApp
Coexistence isn’t available for personal accounts. Follow How to Migrate from WhatsApp App
to a ChatSyncs Business Account first.
4
Yes — it's already connected to another BSP or platform
See What Is a BSP — and Can You Move to ChatSyncs From One? — the number and
its history stay intact; only the connected platform changes.
Second question: Embedded or Manual?
Within the “brand-new number” and “already have a Meta app” cases, there’s a second choice:
Start with How to Connect Your Number to ChatSyncs; only fall back to How to Connect Your WhatsApp Account Manually
(Alternative Method) if it won’t work for the account.
Frequently asked
Will I lose my existing WhatsApp number if I connect it to ChatSyncs?
Will I lose my existing WhatsApp number if I connect it to ChatSyncs?
Not if it’s on the WhatsApp Business App (use Coexistence) or already on another BSP (the
number stays in Meta regardless). Only personal WhatsApp numbers require deleting the
account first, since Coexistence doesn’t support personal accounts.
What's the difference between Cloud API and Coexistence in Embedded Signup?
What's the difference between Cloud API and Coexistence in Embedded Signup?
Cloud API connects a fresh virtual number dedicated to ChatSyncs. Coexistence keeps an
existing WhatsApp Business App number working on the phone at the same time.
When should I use manual connection instead of Embedded Signup?
When should I use manual connection instead of Embedded Signup?
When Embedded Signup fails for the account, or when you specifically want to see and control
every credential (Business Account ID, access token, webhook setup) yourself.
Can I switch connection methods later?
Can I switch connection methods later?
Generally yes — the number and WABA stay owned by the Meta Business Portfolio, so changing
how it’s connected later doesn’t mean starting over.