Use Cases

Two Factor Authentication

Use SMS or voice codes to verify customer account credentials and keep your data safe.

Quick Implementation
Easily add an extra layer of security with a one-time PIN code sent to a user’s phone.
Security When It Counts
Keep payments, account change confirmations and access to your servers secure.
Build What You Need
Avoid the limitations of out-of-the-box solutions. Use our flexible API to build a custom experience.

HOW IT WORKS

Validate your users for added security

Sign-in triggers a PIN code message

A user signs into their account with their username and password. Based on your application’s logic, this will trigger Telnyx to send a PIN code via voice or SMS to the phone number associated with that user’s account.

Code is received and entered correctly

The user receives the code and enters it into your application’s PIN code input field.

Access granted

Your application verifies the PIN code to confirm that the user’s phone number is linked to the account. Your application will then give the user full access.

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Everything you need to build two-factor authentication with Telnyx

Quickstart guides
Easy-to-follow tutorials
SDKs in your preferred language
API reference docs

Explore the docs

Choose Telnyx for messages that send the first time, every time.

High Deliverability
Telnyx is an enterprise-grade carrier with our own private backbone.
Deep Number Inventory
We give you infinite choice and flexibility with phone numbers in over 60 countries.
Global Reach
Extend your global footprint to reach any SMS-enabled number in the world.
Unparalleled 24/7 Support
Our team of in-house engineers is available around the clock.
Fair and Transparent Pricing
We offer pay-as-you-go pricing with automatic volume and commitment discounts.

See SMS Pricing

Ready to Get Started?

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Questions on setup? Talk to our experts