Two-Factor Authentication Services & API

Securing Digital Identity: The Crucial Role of Two-Factor Authentication Services & API in Enhancing Business Data Protection and User Trust.

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Trusted Two-Factor Authentication Services

Esendex’s Two-Factor Authentication service is Trusted by Some of The Biggest Brands in The World!

Two-Factor Authentication for Business

The security of user accounts and sensitive information has become a major priority for organizations and individuals alike in the ever-changing digital communication landscape and online transactions. The increasing sophistication of cyber threats necessitates robust solutions to thwart unwanted entry attempts efficiently.

Two-factor authentication (2FA) has evolved as an effective and proven means of improving security by adding a layer of protection to the usual username-password combination. At Esendex, we take pride in providing a comprehensive and cutting-edge Two-Factor Authentication Service that strengthens your security measures and improves the user experience.

Let’s discuss the concept of 2FA, compare it to Multi-Factor Authentication (MFA), explore alternative authentication methods, emphasize the benefits of our service, and shed light on our commitment to worldwide reach and fraud prevention.

An Overview of Two-Factor Authentication (2FA)

Two-factor authentication (2FA) is a security feature that requires users to provide two unique forms of identification before accessing their accounts or sensitive information.

While the typical username-password combination is subject to hacking and phishing assaults, 2FA adds an extra layer of security, making it far more difficult for unauthorized users to access.

Double-Factor Authentication (DFA)
vs. Multi-Factor Authentication (MFA)

Although the terms are sometimes used interchangeably, Two-Factor Authentication (TFA) and Multi-Factor Authentication (MFA) differ slightly in their methodologies. 2FA, as the name implies, contains two authentication factors. Still, MFA includes a broader range of elements, such as something you know (a password), something you have (a smartphone or hardware token), and something you are (biometric data). While MFA adds levels of protection, it may also create additional complications and user irritation.

At Esendex, we believe in finding the ideal balance between security and user experience. Our 2FA solution delivers an essential level of security without burdening customers with a time-consuming authentication process. We provide a variety of authentication channels so that customers can select their preferred way, which supports increased adoption rates and user happiness.

Numerous Authentication Channels

One of the key benefits of our Two-Factor Authentication Service is its adaptability. We understand that different users have varied preferences and levels of comfort with different login methods. We provide a variety of authentication routes to meet a wide range of user requirements:

Short Message Service

SMS authentication is one of the most popular 2FA options. It entails delivering a one-time code to the user’s registered cellphone number through text message, which they must enter to obtain access to their account.

Voice Calls

SMS OTP verification is the most reliable method of authentication. It’s one of the only ways to ensure the user can access a system or account, reducing the risk of fraud and unauthorized access to critical information. SMS verification via OTP has been a trusted strategy for securing digital transactions for years.


Users can choose to get a one-time code through email for a seamless and speedy authentication experience, which they can then use to log in securely.

Push Notifications

Push notifications provide a quick and safe means of authentication. Users are prompted to authorize or refuse access via a notice on their registered device.


WhatsApp, one of the most popular messaging programs in the world, provides users with a familiar and quick authentication mechanism.

TOTP (Time-Based One-Time Passwords)

TOTP generates time-sensitive codes using mobile apps such as Google Authenticator or Authy, providing an additional layer of protection to the authentication process.

Messages Approved by Global Carriers for Seamless Delivery

The timely delivery of authentication messages is critical for the effectiveness of any two-factor authentication system. We at Esendex understand the importance of ensuring verification messages reach users as soon as possible, regardless of location.

We employ carrier-approved templated messages to eliminate the danger of carriers’ filtering or restricting communications. This ensures that our communications are delivered following the highest standards, allowing users to finish the authentication procedure easily.

Furthermore, in an increasingly globalized world, firms frequently operate globally, supplying customers from various areas and countries. Our platform includes automatic translation capabilities, allowing you to communicate in many languages while adhering to international rules. This seamless connectivity means your users can use your services securely and conveniently, no matter where they are.

A Proactive Approach to Fraud Mitigation at Scale

Fraudulent activity can pose a substantial risk to your company and its users. Esendex takes a proactive approach to combating fraud and safeguarding your digital ecosystem.

Our Two-Factor Authentication Service includes powerful real-time fraud monitoring technologies that evaluate traffic patterns and user behavior. We eliminate threats such as Artificially Inflated SMS Traffic by recognizing and blocking suspicious actions in real-time, eliminating unwanted access attempts before they harm.

Silent Network Authentication: Enabling a Convenient User Experience

The user experience is critical to the success of any authentication service. We understand how important it is to provide users with a smooth and trouble-free experience. Our revolutionary Silent Network Authentication functionality allows users to validate phone number possession without disrupting user flow.

This smooth and secure process instills trust in users and encourages them to stay engaged with your app or platform. We ensure users have a great experience using your services by eliminating interruptions or delays during the login procedure.

Products for a range of use cases


Texting API designed to send & receive SMS & MMS globally using a short code or 10DLC number.

SMS Software

Easy to use SMS software that can send & receive SMS & MMS using a short code or 10DLC number.

Voice Broadcast

Powerful voice API that sends mass automated phone calls quickly to mobile & landline devices.

Phone Verification

Verify mobile & landline numbers, find service providers, & define time zones to restrict calling.

Let’s start sending, together.