Deliver one-time passwords through WhatsApp Business API — the channel your users already have open. Higher delivery, faster verification, zero friction.
From template management to intelligent fallback — Narvark handles the full WhatsApp delivery stack so you don't have to.
Sub-2 second delivery via official WhatsApp Business API. Messages are pushed directly through Meta's infrastructure, bypassing carrier delays.
If WhatsApp delivery fails or times out, Narvark automatically retries via SMS — ensuring 99.99% delivery with zero configuration required.
Pre-approved WhatsApp Business message templates with your company name, logo reference, and custom copy. No "unknown sender" friction.
WhatsApp is available in 190+ countries with 2 billion+ active users. Reach customers who don't have reliable SMS — especially across LATAM, MENA, and South Asia.
All WhatsApp messages are end-to-end encrypted by default. OTP codes never travel unencrypted across the network — unlike traditional SMS.
Real-time delivery receipts, read confirmations, and per-message status webhooks. Know exactly when your OTP was delivered and read.
Built-in rate limiting, velocity checks, and suspicious number flagging. Stop OTP farming and SIM-swap attacks before they reach your system.
One API call sends via WhatsApp with automatic fallback to SMS. No separate integration, no extra keys — just specify channel: "whatsapp".
Set custom code expiry from 60 seconds to 24 hours. Narvark automatically appends expiry messaging to the WhatsApp template to inform the recipient.
POST to the Narvark OTP endpoint with the user's phone number and channel: "whatsapp". That's it.
The OTP is dispatched instantly via WhatsApp Business API using your approved template. Fallback to SMS triggers automatically if needed.
User enters the OTP in your app. Call the verify endpoint. You get a valid: true or false response.
Receive real-time webhooks for sent, delivered, and read status. Build smart retry flows or show users confirmation that their OTP was received.
Open rates, delivery speed, and read confirmation — WhatsApp outperforms traditional SMS across every metric that matters for authentication.
See Full Comparison →Talk to our team about deploying WhatsApp OTP with Narvark. We will review your authentication flow, volume, and fallback requirements.