Foolproof SMS Authentication Service

Keep Your Customers Secure

Nothing is as important as a user's security. Our API makes keeping data secure an effortless task.

SMS Authentication Service


overall conversion rate


higher conversion rates than email


account threats eliminated

What Is SMS Authentication?

A phone authentication service verifies users with a text message. The message typically contains a 4-digit code.

Text authentication done through OTP or TOTP adds an extra verification factor. For signups, you can use email and SMS to avoid spam registrations.

Trending Use Cases of SMS Authentication

New Registrations

Send your new customers a one-time SMS passcode to make sure they’re real people.

New Registrations
What is SMS Authentication

An Essential Service

Many industries require SMS authentication on a daily basis. Websites that need to verify their users the most deal with online registrations, financial transactions, or sensitive private information.

SMS authentication is also necessary to verify a user’s identity on social networks. This way, authentication services prevent fake and fraudulent accounts from registering. Similarly, retail stores also use SMS authentications to provide users access to a loyalty program or confirm a coupon or discount.

Industries that Use SMS Authentication the Most




Financial Services






B2B SaaS






Gaming Apps

Advantages of Dexatel’s API


Analyzing Performance

Track the passcode delivery rate to ensure you are using your customers’ preferred channel—email, SMS, voice, or other.


Your Ready-to-Go API

Our API securely delivers OTP and TOTP messages. Not only does our API ease your job, but it also saves you time.


Personalized Channels

Let customers choose their preferred channel. Implement fallback to ensure your messages are delivered in any scenario.

Accomplish This With Our API

API-based SMS authentication can be a convenient and secure way to protect access to data or systems. It is important to choose a reputable API provider and to properly set up and test the system before using it in production.

Try it Yourself

Try out Dexatel’s API free of charge to have a general idea of what it looks like and how it operates. We offer free text authentication service testing to every company, so try it yourself!

Got SMS Authentication Questions? Find the Answers Here

How Does SMS-Based Authentication Work?

SMS-based authentication works by sending a one-time password to the recipient’s phone number, which you then enter to authenticate and verify the user.

Is Text Message Authentication Secure?

Yes, text message authentication provides an additional layer of security compared to just a password.

Are Authenticator Apps More Secure Than SMS?

While authenticator apps are highly secure, users will require an internet connection, whereas with SMS authentication, you’re not reliant on WiFi or cellular data.

How to Start Using an SMS Authentication Service?

First, choose a reliable SMS authentication service provider like Dexatel and sign up for an account. Set up your account settings, including configuring your authentication methods and security preferences, and integrate it into your application or website.

Get Started Now

Claim your 30-day free trial now, no credit card required!