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.
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.
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.
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.
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.