2-Factor Authentication with SMS and Voice


With our 2 Factor Authentication shield your business transactions, application and highly confidential information.

Now generate a one-time password or PIN or receive an additional log in credential on your mobile device which will be delivered via SMS or Voice.

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A complete solution for user safety

PIN Generation

With our in-built logic that is required for PIN generation (OTP) in the platform, so you don’t have to bother about it.

Number Lookup

Our number authentication helps you to save money and increase conversion rates. With the help of number look-up, we can pick out the invalid numbers as they are entered to ensure that your message is delivered to the valid numbers only.

Voice Failover

2FA which are sent over Voice-based capabilities, enables the service provider to place calls and deliver user authentication PINs via voice audio. To ensure close to 100% message delivery, you can add Voice failover.

How Vasudev 2FA works

Step 01

User downloads an app.

Step 02

User enters cell phone number.

Step 03

Number Lookup checks number validity. Vasudev alerts app maker if number is invalid.

Step 04

App maker alerts user the number entered is invalid, and prompts the user to re-enter number.

Step 05

Number is validated and a PIN is sent to the correct number. With Vasudev 2FA the PIN can be sent via SMS or Voice.

Step 06

User enters the PIN to complete app activation.

Global 2FA capabilities powered by our platform

Global Delivery

Deliver your authentication PINs to users regardless of their location. With Vasudev’s global coverage spanning 800 networks and 190 countries, you can deliver your one-time PINs with best delivery rates and speed available on the market.


SMPP/HTTP REST APIs allow you to create a custom-made 2FA solution in the programming language of your choice.