WhatsApp OTP

Authentication users with WhatsApp OTPs

Enable your users to login securely with the chat app they love.

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Free plan includes unlimited MAUs

Why WhatsApp OTP with Authgear

Lower-cost, secure OTP delivery on the messaging app users already trust.

Cut OTP costs in many markets
WhatsApp’s messaging pricing for authentication can be markedly cheaper than SMS depending on the country. Up to 80% cost saving.
More private by design
WhatsApp uses end-to-end encryption so only the intended user can read the OTP, unlike SMS, which isn’t E2E encrypted.
Reach users where they already are
WhatsApp is the world’s most popular messenger with ~2.9B monthly users, and 100M+ in the U.S. alone. So your OTPs land in a familiar, high-engagement channel.
Works even without cellular service
OTPs deliver over any internet connection, so users can authenticate even when they have no cell signal.

How It Works

User enters their phone number
Authgear issues a one-time code to their WhatsApp
User submits the code and is securely signed in

Authgear enforces rate limits, account lockout, and bot protection (CAPTCHA) to keep OTP flows safe and abuse-resistant.

Authgear also supports multi-channel fallback, e.g., try WhatsApp first, then SMS. so you never strand a user.

Ready to reduce costs and boost verification rates?Let’s ship WhatsApp OTP with Authgear

Start for freeGet a Demo

Free plan includes unlimited MAUs