Access to Authentication

Combine a unique identifier device (aka a mobile phone) with contextual data, and you have secure, user-friendly two-factor authentication with programmable, feature-rich APIs.

Access to Authentication

Without Hassle

Secure your customers’ accounts and transactions with user-friendly two-factor authentication (2FA) with SMS and voice. Our feature-rich APIs help you verify new users, reduce fake accounts and spam, build user trust, and minimize account takeovers with channels that don’t require smartphones, apps or data connection.



A feature-rich, robust API that detects the phone number type (mobile or landline) and sends the passcode via the appropriate channel (SMS or voice). Complete with multi-language and customization support.


2FA Smart Contract

World’s first smart contract built to connect Blockchain applications to a 2FA API in the real world. Find out how tyntec connects the on-chain and off-chain applications.

Here are some great ways to use Authentication in your business

Clear and Concise

Authentication made easy

Authentication How it Works
Authentication made easy - This is how it works

1. User registers on your website or app and provides a mobile phone number for verification

2. tyntec’s API can automatically choose the channel to send the verification code (SMS or voice call) — or the enterprise may give the user the option to choose

3. Both SMS and voice trigger the enterprise’s web back-end and calls the tyntec 2FA API with the provided phone number

4. tyntec sends the user a unique one-time password (OTP) via SMS or voice call

5. User enters the OTP on the website or app to verify his identity

6. The enterprise’s back-end sends an API call to the tyntec 2FA service and tyntec replies, confirming whether the OTP entered by the user is correct or not

7. If the OTP is correct, the website back-end can authorize the registration.

WhatsApp Integrations | tyntec

Key factors to consider for your authentication method

When does authentication become really critical?

Is there a single most important factor when choosing an authentication method? (hint: users first)

Is authentication bad for Customer experience?

What are the pros and cons of different methods?

Why is SMS still the most popular delivery method for 2FA?

Choose which service works best for you

Make the most of tyntec's advanced features

Assured, speedy delivery

Using our direct connections to telecom operators, we ensure fast, secure delivery to the endpoint – and share the monitoring data with our customers.

Frictionless integration

Stronger authentication with less coding – welcome to our simple, robust authentication APIs. Developers can configure features according to their needs, including password generation, language templates and more.

Real-time verification

Building on our industry-leading number information service, we can dynamically adjust user authentication requirements depending on the threat level, using real-time phone number information such as roaming information, user location, and phone status (on/off).

2FA Api


Ready to start? Get our REST API — and rest easy

Authentication Guide

Authentication Guide

Want more details? Read our authentication guide

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Protecting customers without hassle

tyntec's partner Isaac Potoczny-Jones, CEO of Tozny, a leader in multi-factor authentication systems, discuss the common mistakes brands make with security.

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How does our 2FA API work?

Authentication made easy

Find out how to secure your customer journey without sacrificing user-friendliness with tyntec’s 2FA API.