One-Time Passcodes (OTP)

Build effortless auth experiences

Use our API and SDKs to sign up and log in your users with a simple and secure One-Time Passcode — via SMS, WhatsApp, or email. OTP can be used as a standalone authentication factor or for 2FA.
Screenshot of otp web email
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Screenshot of otp mobile passcode message 1

SMS Passcodes

Authenticate in a snap

Create seamless mobile experiences with SMS Passcodes. With autofill on Android and iOS, your users don’t even need to enter the One-Time Passcode manually.
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WhatsApp Passcodes

Log in anywhere, at any time

Global by design and with a network used by 3 billion people — WhatsApp Passcodes remove the deliverability issues that impact text messages internationally.
Screenshot of otp whatsapp passcode message

Email Passcodes

Power passwordless authentication on email

Use Email Passcodes on both desktop and mobile, unlock seamless cross-device log ins, and leverage multiple integration options.
Screenshot of otp web passcode email

Drive conversion

Deliver a first-class authentication user experience to your users all over the world. No passwords needed.

Balance security & usability

Increasing the difficulty and cost of account takeover attacks, One-Time Passcodes are safer than password-based authentication options. For both users and businesses.

Be flexible

Use One-Time Passcodes as a primary factor or as a two-factor authentication option.

How it works

One-Time Passcodes, made easy

Integrate Stytch One-Time Passcodes as your authentication solution, without lengthy build times. An OTP is super flexible — it can be used as a primary authentication factor or for MFA.

Our platform

Explore other authentication products

Pick the product that’s most suited to your app and user experience by choosing from a range of options.