Send WhatsApp template and session messages, deliver one-time passwords over WhatsApp, and build against a full sandbox before you go live. One API, the same platform you already use for SMS and voice.
Start in sandbox mode with no WhatsApp Business account required.
YourBank
Verified business account
What you can build
From authentication to customer care, all through the same Hellio API and dashboard.
Send pre-approved, business-initiated templates for notifications, receipts and reminders.
Reply freely within the 24-hour customer service window for support and conversations.
Deliver one-time passwords with authentication templates, with automatic fallback to SMS or voice.
Build and test the full integration with simulated sends, no WhatsApp Business account required.
Reach WhatsApp users worldwide with the same numbers and contacts you already manage.
Receive inbound messages and sent, delivered and read status updates in real time.
In sandbox mode every send is simulated and returns a message id instantly, without contacting WhatsApp or needing a Business account. Wire up your integration, verify the flow, then flip to live.
When you are ready, switch to live mode and the same code sends real WhatsApp messages through the official Cloud API, with delivery and read receipts flowing back to your app.
Create an account and start in sandbox mode in minutes. Go live when you are ready.
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