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SMS passcodes

A simple and secure way to sign up and log in users with a one-time passcode.

Build a first-class login experience

Build a first-class login experience

Most legacy authentication options were made with the desktop in mind. Phone number login with SMS passcodes improves conversion and security on any device, and it’s particularly well-suited for the mobile user experience.

One-tap onboarding and login

One-tap onboarding and login

Elevate mobile experiences with phone number login — featuring auto-fill on iOS and Android — making it lower friction than passwords on any device.

Balancing security and usability

Balancing security and usability

Making account takeover more difficult and costly, phone number login is safer than password-based authentication options for both users and businesses.

Built-in redundancy

Built-in redundancy

For best-in-class reliability, we build failover logic that smartly routes SMS passcodes through multiple programmatic SMS platforms.

Flexible integration options

Flexible integration options

Our flexible APIs make it simple to use this method as a primary factor or as a two-factor authentication option to strengthen security.