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Build with Prelude

Prelude has a suite of APIs to help you verify users, prevent fraud, and manage authentication at scale. Find the documentation for each product below.

Verify

Verify phone numbers and emails worldwide across SMS, RCS, WhatsApp, and Silent Network Authentication.

Auth

Manage the full lifecycle of user authentication: OTP, password, social login, and step-up, with fraud prevention built in from day one.

Watch

Protect your business and users from fraud by analyzing in real-time dozens of digital signals to block suspicious users before verification. Millions of fraudulent requests blocked every year.

Intel

Phone number intelligence API. Retrieve carrier data, line type, portability status, and caller name for any number worldwide.

Notify

Send transactional and marketing messages globally via SMS, RCS, and WhatsApp, automatically routed for maximum deliverability across 230+ countries.
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