Twilio has acquired Stytch auth. Learn more
Twilio User Authentication & Identity
Unlock world-class verification and onboarding
Verification and fraud prevention infrastructure that easily drops into your application to deliver a low-friction customer experience with high conversion.
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. Utilize our Verify and Lookup APIs together to supercharge your authentication solutions and get the most from your investment.
Behind-the-scenes verification for every lifecycle touchpoint
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.
Verify API
Add effortless two-factor authentication to onboarding and transaction flows with one multichannel, turnkey API.
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Mitigate SMS traffic pumping fraud and improve conversion with Fraud Guard.
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Optimize user verification over SMS, Silent Network Authentication, WhatsApp and more.
Lookup API
Automatically validate users behind-the-scenes with mobile carrier data to reduce fraud and abandonment.
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Boost conversions using mobile identity signals to personalize engagement, streamline onboarding, and optimize deliverability.
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Mitigate fraud by triggering added security as needed with risk signal detection, step-up authentication, and more.
Stytch by Twilio
Make your application enterprise and agent ready with SSO, device-level risk intelligence, and scoped access for AI agents.
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Offer SSO to enterprise accounts that’s SAML/OIDC-compliant and easily configurable per customer.
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Reduce fraud and abuse with device intelligence that triggers real-time blocks, challenges, or rate limiting.
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Secure AI agent and MCP workflows by granting scoped access to agents acting on behalf of users.
"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."
Sr. Software Engineer
Resources
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.
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.
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.