One Time Password

Secure Online Transactions With One Time Passwords

Integrate our Two-Factor Authentication API to safeguard your data, accounts, and users transactions.

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Secure Your Business and Accounts With One Time Passwords

Guaranteed Delivery

Our SMS gateway delivers large volumes of messages in a timely manner. By combining SMS with Voice, delivery of your OTP is guaranteed at all times.

Easy API Configuration

Benefit from enterprise scalability with our easy integration and configuration. Generate and deliver OTPs via SMS or Voice, and verify the response.

Bulletproof & GDPR compliant

By adding an extra layer of security you can extend your level of GDPR compliance. Implementing SMS or Voice OTP protects your customer's data.

Channel of Choice

Optimize your conversions by using an OTP channel of your customers' choice: SMS, Push Messages, Voice Calls, Email, WhatsApp.

How Does Our OTP API Work?

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    The OTP request is generated by the API

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    The OTP is sent via a channel of choice

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    The user receives and enters the code

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    Code is verified and result sent via API

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    Only pay for converted OTP (terms apply)

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Build Your Own OTP Verification Solution

Easily authenticate new users, secure account logins, and safeguard transactions with One Time Passwords.

Contact Us to Get Started

Trusted by Brands Worldwide

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Send One Time Passwords via SMS, WhatsApp, Email or Push

Reach your customers wherever they are and send your OTPs via a channel of your choice. Even when users don't have access to the internet, they can still make use of this multi-factor authentication solution.

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    Fast and reliable global delivery on any mobile device

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    Determine code length from 4 to 8 digits

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    Send from a local phone number or sender ID

To the API Docs

Send One Time Passwords via Voice Call

With Voice OTP, the password is received as a spoken message. It allows you to also reach users with limited sight and destinations that are not reachable by SMS.

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    Use Voice as a backup in case your SMS is not delivered

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    Available in different spoken languages and voices

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    Push your delivery rates close to 100 percent

To the API Docs

Why Choose as Your OTP Provider

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99,98% Up Time

Fast delivery of time-critical messages are guaranteed

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Direct Connections

Our platform is connected to 2000 operators worldwide

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Secure & Reliable

Rely on our ISO 27001 certified redundant platform

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24/7 Support

Benefit from our round-the-clock and in-house support

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Realtime Analytics

Get clear control and insights on your costs and traffic

How Other Companies Use Our OTP API

When creating an account, Tantan asks for the mobile phone number of the user. This number is verified by sending a One Time Password via a text message.

Asian Dating App Tantan

The registration for the Formula 1 required a unique OTP via SMS code. Due to this filtering, more than 11% of the requests have already been blocked because they turned out to be fraudulent.

Formula 1 Heineken Dutch Grand Prix

Our REST API Integrated Quick and Easy

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Build With SDKs

Easily integrate our SMS or Voice One Time Password API into your existing systems and start sending One Time Passwords worldwide. There are several example codes available for different programming languages for both our SMS as Voice API.

To the Docs on GitHub

Worldwide OTP Pricing

Volume Discount from 50.000 Messages

Pricing based on individual messages for a specific destination.

Country OTP via SMS (from) OTP via Voice (from)
Country OTP via SMS (from) OTP via Voice (from)

United States

€ 0,0073

€ 0,0017


€ 0,0389

€ 0,0344


€ 0,0274

€ 0,0299

South Africa

€ 0,0193

€ 0,0619

United Kingdom

€ 0,0534

€ 0,0051

Pricing based on individual messages for a specific destination.

Integrate Our Powerful OTP API Into Your Software

Enhance your application security and manage user verification via SMS and Voice, with our reliable and secure two-factor authentication solution.

Contact Us to Get Started

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