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Authy: 2FA and Passwordless Login

For new development, we encourage you to use the Verify API instead of the Authy API. The Verify API is an evolution of the Authy API with continued support for SMS, voice, and email one-time passcodes, an improved developer experience, and new features including:

  • Twilio helper libraries in JavaScript, Java, C#, Python, Ruby, PHP, and Go.
  • Access via the Twilio CLI.
  • Improved visibility and insights.
  • A push authentication SDK embeddable in your own application.

You are currently viewing the Authy API. New features and development will be added only to the Verify API. Check out the FAQ for more information and the migrating to Verify guide to get started.

Authy helper libraries

So you don’t have to use the Authy API directly to integrate two-factor authentication into your app, we provide a helper library for common web languages. If your language is supported, it’s the fastest way to get started. Here are the current libraries:

API reference

Authy application

The Authy app is our free application for time-based one-time passcodes. It’s available for iOS, Android, macOS, Windows, and Linux.


To find out about Authy pricing, check out our pricing page or reach out to sales.

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