AI API

WhatsAuth

WhatsApp-based authentication service — replace SMS OTP with faster, cheaper verification via WhatsApp messages

whatsauth.com

Verified API available

Quick facts
What is it	WhatsApp-based authentication service — replace SMS OTP with faster, cheaper verification via WhatsApp messages
Pricing	Paid — from $25/mo
Free tier	No
Platform	API
API	Yes
Best for	User onboarding and account verification, Two-factor authentication for web applications
Domain registered	2021

Data updated Aug. 1, 2026

What does WhatsAuth do?

WhatsAuth is an authentication service that uses WhatsApp instead of traditional SMS for delivering verification codes and OTP (One-Time Passwords). It provides developers with an API that generates unique verification codes and sends them to users via WhatsApp messages, complete with clickable links and QR codes for seamless authentication. The service handles the entire verification flow, from code generation to expiration and response handling.

WhatsAuth works through a simple API call where developers specify parameters like callback URLs, expiration times, and custom messages. The system returns a verification code along with both a direct WhatsApp link and a QR code that users can scan. This approach eliminates the need for users to manually type codes, wait for SMS delivery, or worry about phishing attempts. The service claims significant advantages over SMS, including 74% lower costs, 90% faster delivery times, and 98% higher conversion rates.

This solution is particularly valuable for developers and businesses building web applications that require user verification. It's ideal for onboarding new users, implementing two-factor authentication, or replacing expensive SMS-based verification systems. Companies looking to improve their sign-up conversion rates while reducing authentication costs will find WhatsAuth to be a practical alternative to traditional OTP methods.

AI API LLM

#api integration#developer tools#security#user verification

Key features

What makes it stand out

WhatsApp message delivery for verification codes instead of SMS

74% cheaper than traditional SMS OTP services

90% faster delivery compared to regular OTP systems

98% higher conversion rates for user verification

QR code and direct link options for seamless authentication

Who is WhatsAuth for?

Who benefits most from this tool

User onboarding and account verification

Two-factor authentication for web applications

Replacing SMS-based OTP systems

Pricing

Starter

$25.0/month

1,000 credits
0.075 cost per validation
1k Credits
$0,075 per validation

Professional

$100.0/month

30,000 credits
0.01 cost per validation
30k credits
$0,01 per validation

Enterprise

$500.0/month

300,000 credits
0.005 cost per validation
300k credits
$0,005 per validation

Trust & presence

Domain Domain registered 2021

Gallery

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