Twilio User Authentication & Identity

Unlock world-class verification and onboarding

Seamless verification solutions optimized for one-time password conversion and efficient performance that enhance customer experiences.

Illustration showing a business verifying a customer’s information via SMS and a UI tracking verification attempts.

Treat your customers to a VIP authentication experience

Remove the friction from onboarding and transactions with authoritative phone data validation and real-time verification. Validate users automatically at any touchpoint to identify then fast-track real customers into no-input verification.

4.5+ billion

verifications each year

130 billion

messages sent and received yearly

99.95% +

monthly API uptime


global carrier partner

Lifecycle examples

Behind-the-scenes verification for every lifecycle touchpoint

User identity validation using Twilio carrier signal data and possession factors.

New user activation without friction

Discreetly confirm user identities with carrier signal data and possession factors. With Silent Network Authentication you can trigger no-input onboarding for real users—or added security to halt fake account creation.


Build your end-to-end verification solution with trusted APIs

Twilio Verify API authenticates users with two-factor authentication across channels

Verify API

Add effortless two-factor authentication to onboarding and transaction flows with one multichannel, turnkey API.

  • Mitigate SMS traffic pumping fraud and improve conversion with Fraud Guard.

  • Optimize user verification over SMS, Silent Network Authentication, WhatsApp and more.

Lookup API validates users behind-the-scenes using phone data intelligence

Lookup API

Automatically validate users behind-the-scenes with mobile carrier data to reduce fraud and abandonment.

  • Boost conversions using mobile identity signals to personalize engagement, streamline onboarding, and optimize deliverability.

  • Mitigate fraud by triggering added security as needed with risk signal detection, step-up authentication, and more.

“Secure onboarding and account security is an important focus for us and our customers. We use Twilio to verify phone numbers and to make sure that the right account or right supplier is behind the right phone number...Twilio was a great decision for us.”

Andrew Solomon Sr. Software Engineer
Ebook: 5 Best Practices for Seamless & Secure
User Onboarding


5 best practices for seamless and secure user onboarding

Learn how to build an onboarding process that satisfies customers while keeping both their accounts and your platform secure from day one.


Unlock growth without sacrificing security or experience

Cut acquisition costs

Reward customers with a lifecycle of friction-free authentication that drives conversions and lifetime value, plus weeds out fake users to reduce fraud and boost marketing returns.

Optimize data and decision making

Collect reliable data from verified end-users only. Our mobile carrier signals confirm user identities at signup, helping you make smart decisions throughout the customer journey.

Customize multichannel at scale

Deliver verification experiences that your customers prefer. With easy-to-integrate APIs and developer tools, it’s simple to build, customize, and scale your perfect solution.

Getting started

Drive revenue and trust with an end-to-end user verification solution

Delight customers with frictionless authentication at every touchpoint. Build silent data validation and zero-effort verification into your engagement solution with Twilio’s trusted APIs that integrate with any tech stack.