User Authentication & Security

Smarter fraud defense, seamless user journeys

Fraud is evolving. Twilio helps you stop it in its tracks with smarter authentication, built to protect your users without slowing them down.

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Keep fraud out and trust in, from first interaction to every login

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Verify API

Welcome real users, reject bad actors. Verify customers instantly across SMS, voice, WhatsApp, email and more, all while reducing friction and fraud.

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Messaging API

Messages that build trust at scale. Engage users on their terms with verified, high-quality messaging across the channels they trust most.

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Lookup API

Fraud defense that won’t break experiences. Spot risky signups early, block bad actors instantly, and keep your real users moving—no delays, no detours.

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Trusted by innovators building secure, seamless experiences

See how leading brands use Twilio to keep users safe and journeys smooth.

"Verify greatly reduces our own support costs, over other verification methods."

Suhas Joshi Engineering Manager

"Twilio is a cost efficient and simple way to test the feasibility of new features. We ended up choosing Twilio’s API for WhatsApp because it meant we could focus on the product, not on the complex requirements of WhatsApp’s infrastructure."

Anne Byrne Backend Engineer & Customer Experience Team

"Secure onboarding and account security is an important focus for us and our customers. We use Twilio in order to verify phone numbers and to make sure that the right account or right supplier is behind the right phone number."

Andrew Solomon Senior Software Engineer

Twilio Verify

Stripe – Smarter verification, smoother logins. ~70% of user verifications handled by Twilio Verify. 6 point improvement in login success rates.

Twilio Messaging

Deliveroo – Trusted comms at scale. 25% opt-in rate for notifications.

Twilio Lookup

Choco – Trusted onboarding, powered by clean data. 2+ hours a week saved with ordering. 15,000+ restaurateurs use Choco.

How Verify protects users without slowing them down

Twilio Verify uses adaptive, intelligent authentication to confirm real users in real time—stopping fraud before it starts, without adding friction.

Here's how it helps your team:

Frictionless logins, smarter flows

Silent mobile signals and OTPs work behind the scenes to verify users without interrupting their journey
Intelligent fraud prevention

Tactics like fake users, and spoofing are flagged instantly, before they become a threat
Global by design

Built-in compliance and formatting for 200+ regions means you’re ready to scale from day one
Faster onboarding, fewer support tickets

Let real users in faster and free your team from verification-related issues

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How Messaging keeps conversations secure and trusted

Twilio Messaging powers trusted conversations on SMS, WhatsApp, MMS, and more so your users stay informed, engaged, and secure.

Here’s how it helps your team:

Talk to customers on the channels they trust

One API covers alerts, updates, and support from WhatsApp to SMS
Built-in protections against spam and abuse

Stay compliant and secure with smart safeguards baked into every message
Real-time insights, real-time fixes

Track delivery, monitor engagement, and optimise every campaign with ease
Global scale, local speed

Local sender IDs, smart routing, and delivery to 180+ countries out of the box

How Lookup flags risk without blocking real users

Twilio Lookup checks phone numbers in real time, flagging fraud risks and cleaning your data before bad actors ever get through

Here’s how it helps your team:

Know if a number is valid before you engage

Catch typos, invalid formats, and unreachable numbers instantly
Understand what kind of number you’re reaching

Know if it’s a mobile, landline, or VoIP so you can pick the best way to reach them
Spot fraud signals early

Catch signs of fraud like spoofing and SMS pumping before they cause problems
One API call, full insight

Check number type, validity, and risk score in one streamlined check

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Secure every step

From sign-up to support, Twilio helps you protect users and stop fraud without slowing anyone down.

Stop fake sign-ups before they start

Catch bots and bad actors at the door. Twilio Verify lets you authenticate real users via SMS, WhatsApp, email, or silent mobile signals all before they enter your user flow.

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Protect logins and transactions

Add smart, multi-factor authentication to login flows, password resets, and high-value tasks. Trusted by fintechs and global platforms.

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Reach the right users on the right channels

Validate phone numbers, detect line types, and send smarter messages that actually land and get read.

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Fraud risk detection, built in

Detect SIM swaps, spoofing, and SMS pumping before damage is done and block threats without blocking real users.

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Send messages that users trust

Reach customers with verified sender IDs, local compliance, and built-in protections. Trusted channels mean higher open rates & engagement.

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Why Twilio?

Security shouldn’t slow you down. With Twilio, your team delivers seamless customer experiences with global reliability and built-in trust.

Here’s why teams trust us:

Smarter fraud prevention

Intelligence and carrier data stop bad actors early

Frictionless user flows

Let real users in fast while fraud gets blocked behind the scenes

Global scale, local compliance

Trusted globally, compliant locally in 180+ countries

Flexible APIs that fit your stack

Developer-friendly tools that integrate fast and flex with your needs

Outsmart fraud, not your customers

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