Reach your customers where they already are
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.
GTBank
Verified business account
GHS 500.00 spent on acct ****1234 at SHOPRITE. Bal: GHS 3,240.50 09:41 ✓✓
GHS 2,000.00 received from JOHN MENSAH. Bal: GHS 5,240.50 09:44 ✓✓
What you can build
Everything you need for WhatsApp
From authentication to customer care, all through the same Hellio API and dashboard.
Template messages
Send pre-approved, business-initiated templates for notifications, receipts and reminders.
Session messages
Reply freely within the 24-hour customer service window for support and conversations.
OTP over WhatsApp
Deliver one-time passwords with authentication templates, with automatic fallback to SMS or voice.
Sandbox / demo mode
Build and test the full integration with simulated sends, no WhatsApp Business account required.
Global reach
Reach WhatsApp users worldwide with the same numbers and contacts you already manage.
Delivery webhooks
Receive inbound messages and sent, delivered and read status updates in real time.
Test before you go live
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.
Ship with confidence
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.
Add WhatsApp to your stack today
Create an account and start in sandbox mode in minutes. Go live when you are ready.