Verify API
Zalo OTP
Authenticate your users instantly with the delivery of one-time passwords via popular Vietnamese communication platform, Zalo.
Why Choose Zalo OTP?
Dominant in Vietnam
The most popular communication platform in use in Vietnam is the Zalo messenger, with over 75 million active subscribers.
High Engagement Rates
Zalo OTPs are viewed more successfully, compared with traditional SMS OTPs in Vietnam.
Trusted and Familiar
Vietnamese users trust the Zalo messenger service, so they are comfortable with their authentication process.
End to End Encryption
Security features in Zalo ensure that OTP messages are secured in such a way that only the receiver gets the OTPs sent to him.
OTP Use Cases for Zalo
Sign-Up Verification
It is necessary to verify the person registering to avoid creating fake accounts.
Login Authentication
Improve the login authentication process by incorporating two-factor authentication.
Payment Confirmation
Transactions/Financial operations confirmation in real time.
Password Reset
Authenticate the user before modifying their password. Track updates in phone numbers, other sensitive profile information, etc.
Industries that are gaining the Most from Zalo OTP
Fintech & Banking
The security of online logins, and transactions.
Retail & E-Commerce
Authenticate orders and prevent fraud transactions.
Healthcare
Shield the patient portal and telemedicine access.
Gaming & Entertainment
Verify accounts and in-app purchases.
SaaS Platforms
Ensure account security and streamline user onboarding.
Frequently Asked Questions About Zalo for Sending OTP
What is Zalo OTP verification?
It’s a secure way of verifying identities through a one-time password that goes through the most widely used communication platform in Vietnam - the Zalo messenger service. The service provides a convenient way of confirming identities for any transaction online through the Dexatel’s solution that works successfully within the Vietnamese environment.
Why should I use Zalo for OTP delivery to Vietnam?
Zalo largely dominates the Vietnam market with more than 75 million active subscribers. Compared to the standard SMS method, it has a much higher engagement rate and proves to be very cost-effective for the Vietnam market. Subscribers are already accustomed to the service and know that it is trustworthy.
How does it work?
You send your generated OTP through the Dexatel Verify API using the Zalo Official Account you have. The user gets the code immediately through his/her Zalo mobile app, and then the code is used to access your application after being authenticated through the API.
Do I require a Zalo Official Account?
Yes, to send OTPs, you are required to have a Zalo Official Account (OA). Dexatel will walk you through the procedure of verifying the account with the Zalo platform so that the account is correctly configured and complies with the required criteria.
How long are OTPs valid for? The average validity period of each individual OTP is only a matter of one to five minutes, and each OTP is only valid for a single use.
What if the delivery of the code through Zalo fails?
Dexatel Verify API provides a smart fallback service. If the delivery of the code through the Zalo service fails, the service will fail back to other services such as SMS and Voice.
How can I monitor the status of the sent Zalo OTPs?
The Dexatel service platform has the capability of real-time monitoring and analyzing the performance of the sent OTPs, which provides you information related to the delivery status and success rate.
Is the Zalo OTP solution compliant with Vietnamese legislation?
The solution is compliant with the telecommunications laws and data privacy laws of Vietnam and will enable your business to operate within the stipulated laws and regulations.
