Compose with the real constraints
Header, body, footer and buttons are validated against Meta’s limits as you type — 1024 characters of body, 60 of header and footer, 25 per button — so a template is rejected before it is submitted, not after.
WhatsApp Business messaging WhatsApp, on the same
WhatsApp, on the same
customer record.
Templates you build and submit for approval, conversations that land in the shared inbox, and journeys that message people on the channel they actually read.
Templates
Built here, approved by Meta, tracked back automatically
Business-initiated WhatsApp messages have to use a template Meta has approved. That round trip is the part teams dread, so it happens inside the product.
Marketing and utility categories
Both supported, with the category chosen at submission because it changes how Meta reviews and prices the send. Authentication templates use a different component model and are not supported yet.
Approval status without leaving
Submission, approval and rejection arrive over Meta’s webhook and update the template in place. Nobody has to sit in Business Manager refreshing a list.
The 24-hour window
The rule that catches everyone, enforced in the mechanism
Meta only allows a free-form reply within 24 hours of the customer’s last inbound message. After that, only an approved template may be sent.
- The inbox knows before you type Every conversation carries a single flag for whether a reply can be sent right now, and why not when it cannot — closed, window expired, or window unknown.
- The same rule at dispatch The check runs again when the message is actually sent, so a reply written inside the window and sent outside it cannot slip through.
- Consent checked at send time Contact consent is evaluated when the message is dispatched rather than when the audience was built, so a withdrawal between the two is respected.
Where WhatsApp shows up
It is a channel on the record, not a separate product with its own contact list.
- Broadcasts to a segment, using an approved template
- Journey steps, so a message is one node among email, SMS and a wait
- Lifecycle stage actions that fire when someone enters or leaves a stage
- Replies from the shared inbox, alongside Messenger, Instagram DM and Telegram
- Conversation analytics that count response times and handovers the same way as every other channel
What this is not. Nommos is not a WhatsApp Business Solution Provider and does not resell messaging. You connect your own WhatsApp Business account, Meta reviews your templates, and Meta’s per-conversation pricing applies as normal.
Bring a template Meta rejected
We will show you where the builder would have caught it, and what the same message looks like as a journey step.