Verify users with
Voice OTP (one-time-password)

Deliver your OTP messages faster and more securely to your users via Voice. By making use of Voice through Spryng’s secure Voice API, you can rest assured that your OTP will be delivered.

All the benefits of
our Voice API at a glance

Ensure a seamless and secure verification process using the most
inclusive communication channel using Spryng’s Voice API.

Increased accessibility using Voice for the visually impaired

Users with difficulty reading can now access their OTPs easily using Voice instead of SMS or authentication apps. Voice allows all users to successfully obtain their OTP’s simply by picking up a mobile phone or landline.

High delivery rates by using a combination of Voice and SMS for OTP

Your authentication messages will be instantly delivered through a highly visible channel, making OTP entry fast and seamless. Many organisations also use Voice as a backup for SMS verification.

Unmatched flexibility for all users using our Voice API for OTP

An inclusive solution that supports mobile phones and landlines, ensuring accessibility for all users, such as those in areas with unreliable mobile coverage. Voice is a crucial verification method for elderly people without mobile phones.

Voice-based OTPs offer a similar level of security as SMS OTPs

Spryng’s end-to-end encryption prevents communication from being intercepted by hackers.

How it works:
Unlock the power of our Voice API today!

Step 1:
Login

Your customers log in to your customer portal and select the “SMS” or the “Phone Call” authentication method.

Step 2:
Phone Call

Given that they chose the “Phone Call” authentication method. A call is received where the customer can listen to the OTP code twice.

Step 3:
OTP Code

The code is entered into the portal by the customer. Following this, the identity of the customer is authenticated, and the log in is verified.

Step 4: Authentication successful

The customer successfully logged in to your platform in less than a minute.

Data security: GDPR proof!

The only supplier in the EU with both ISO 27001 and NEN 7510

Safety first! Spryng is the only supplier in the EU with both ISO 27001 and NEN 7510 certifications. In addition: The security of your data and the data of your customers is 100% GDPR-proof at Spryng. Your security officer will thank you for choosing Spryng.

View our security

Why choose Voice with Spryng?

Countless possibilities with our Voice API

High OTP delivery rates

With 0% downtime over the past two years, Spryng ensures the immediate delivery of your OTP codes to your customers so they can log in as efficiently as possible.

Security & Reliability

Spryng’s Voice API allows OTPs to be delivered safely through encrypted communication channels. With our data protection protocols, you can trust Spryng to provide secure, compliant, and dependable voice-based authentication.

Easy Integration

Spryng’s Voice API is developer-friendly, with straightforward documentation and support for seamless integration across various platforms. This makes it quick and efficient to implement.

Implementing the Voice API

How easy is it to implement our Voice API?

Give users the option to choose whether they would like to receive their OTP code via SMS or Voice. All it takes is one simple step for an enhanced customer journey. Implementing our Voice API is very straightforward. Contact us for the technical documentation.

When your Voice API is activated, you can:

Get Voice delivery reports & export them within seconds
Easily manage everything in one overview.

Have a Voice message with up to 50 characters
The text-to-speech (TTS) endpoint offers built-in voices to customise the rendering of speech from text.

Add Voice as an extra product to the Rest API
Enrich your communication strategy with Spryng.

Discover our online platform

With Spryng, entering an OTP code has never been so easy!

Voice is the ideal solution for elderly users who may have difficulty reading OTP codes. It allows customers to receive a secure, clear, and easy-to-understand phone call, ensuring a smooth and accessible authentication process.

Your customers are ready to embrace Voice, are you?

Interesting recent statistic: 75% of consumers agree that receiving a call to log in to their account is more convenient than an SMS.

Healthcare

Use Voice for patient verification and appointment confirmation.

Spryng for healthcare

Logistics and e-commerce

Voice allows user authentication during registration and online payment confirmation.

Spryng for logistics and ecommerce

Finance

Safely send authentication codes for transactions with Voice.

Spryng for financial services

FAQ’s about our Voice API

What is Voice API?

A Voice API allows you to seamlessly integrate high-quality voice calls into your application or software, enabling real-time notifications. Spryng’s Voice API ensures reliable, secure, and scalable communication. These features make Voice ideal for OTP’s

How to use our Voice API to deliver OTP codes?

To deliver OTP codes using Spryng’s Voice API, simply integrate the API with your application following our comprehensive documentation. When a user requests authentication, your system generates a secure OTP code and triggers an automated voice call to the user’s phone number. The OTP is delivered through clear, natural speech, ensuring accessibility for all users, including those who may struggle with SMS-based authentication. Once the user enters the received code, it’s validated within your application for secure and efficient authentication.

How often is Voice used for OTP purposes?

Voice is increasingly utilised for delivering One-Time Passwords (OTPs), particularly in scenarios where SMS delivery may be unreliable or users have specific accessibility needs. By combining Voice with our API services, businesses can achieve OTP entry rates as high as 100%, ensuring users receive their authentication codes promptly and securely. Additionally, studies have shown that 75% of respondents prefer voice-based authentication over SMS due to its greater convenience and security.

Verify users with Voice OTP (one-time-password)