Two Factor Authentication

Strengthen security with authentication codes sent via SMS or voice.
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Two Factor Authentication

Prevent Unauthorized Access

Simple password protected accounts are vulnerable to credential stuffing, phishing and a range of other attacks. You can prevent unauthorized access to your online service, website, or application by adding two factor authentication.

Two Factor Authentication

Two factor authentication (also known as two step authentication) combines something the user knows (password) with something the user possesses (mobile device) to dramatically strengthen online security. After the user enters their password, a one-time passcode (OTP) that is sent to their mobile device must be entered before they can access their account.

Two factor authentication solutions leverage real time communications channels to send passcodes to mobile devices, making the user experience as smooth as possible. They use internet and telephony channels and many implementations offer users their choice of channels for convenience. For example:

  • SMS channels are used to transmit short, 4-10 character digital codes
  • Voice channels are used to deliver codes with speech synthesis

99% of bulk phishing attacks

are blocked by 2FA sent by SMS (Google)

53% of Americans

surveyed in 2019 are using 2FA (Duo)

⅔ of people

who used security keys or push notifications found it quick and convenient (

Key Features

The Voximplant solution is easy to implement and its serverless architecture makes 2FA services highly scalable.


SMS delivery in 78 countries

and character sets for almost any language and voice delivery in practically any country.


High delivery rates

to rapidly reach users on voice and SMS channels.


Voice synthesis

available in 40 languages using leading TTS platforms.


Over 250 speech synthesis

voice types to differentiate your brand.


Serverless architecture

scales effortlessly.

We help businesses grow

Trusted by the World’s Most Innovative Businesses

Over 30,000 businesses worldwide trust Voximplant to deliver their critical communications.

Ready for Global Applications


Quickly develop applications

With fully custom code using Web, iOS and Android SDKs for React Native, Flutter, and Unity; API clients for Node.js, Python, PHP, Go, .NET, and Java.


Highly reliable global infrastructure

With 14 diverse PoPs on five continents that provide low latency communications to 190 countries.


GDPR and ISO 27001 compliant

Build your app with enterprise-grade security that meets global compliance, including GDPR and ISO 27001.


Best of breed AI integrations

With Google, Amazon, Microsoft, IBM, Yandex, and Tinkoff provide multilingual support.


Rapid deployment

Using our completely self-service administrator portal.

Explore Voximplant Platform

Our Technical Buyers Guide provides a comprehensive look at the Voximplant architecture, features and developer tools.

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