Phone Verification API

Secure, single-use voice or SMS verification codes add reliable security to your systems. As the leaders in voice and SMS verification, TeleSign helps you deliver personalized customer safety anywhere on the globe.

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Trusted Security

Two-factor authentication is the foundation of fraud prevention and account security. Prevent fraudulent account creation and make sure that your digital community is safe, secure, and streamlined with easy to implement one-time passcodes and two-factor authentication.

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Strengthen Authentications & Reduce Fraud

Instant API access to ongoing and accurate key phone number and user identity data attributes to help make better decisions about new registrations, user activity and fraud risks.

Verify Transactions

Ensure your users are who they say and stay PDS2 compliant when customers change important account information, access credit card details, transfer funds, or make payments.

Protect End-User Accounts

Secures accounts from compromise using voice-based OTPs on any phone type, on a global scale.

Prevent Fake Users

Mitigate new account registration fraud and attempts at bulk account creation.

Reach Landline Phones

Enables global reach of users who do not wish to receive SMS-based messages and/or provided a number that is not equipped to receive them.

Trusted Security

Two-factor authentication is the foundation of fraud prevention and account security. Prevent fraudulent account creation and make sure that your digital community is safe, secure, and streamlined with easy to implement one-time passcodes and two-factor authentication.

Unmatched Global Coverage

Reach more customers with 120+ optimized points-of-presence and 700+ direct-to-carrier routes​.

Exceptional Reliability

Optimal performance with higher successful delivery rates than any leading competitor.

5-Star Customer Service

Premium customer support to strengthen communication, reduce costs, and ensure seamless customer interaction.

Protect Your Customer and Your Business

Identify valid phone numbers, flag suspicious users, and prevent fraudulent activity with accurate phone verification data and key user identity attributes.

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Verify Transactions

Ensure your users are who they say and stay PDS2 compliant when customers change important account information, access credit card details, transfer funds, or make payments.

Get started

Learn more

Prevent Fake Accounts

Mitigate new account registration fraud and attempts to create spam accounts in bulk by requiring two-factor authentication. TeleSign makes it easy to verify your end-users – even when SMS isn’t available.

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Verification in Action

Our phone number verification API offers fast, easy, and flexible SMS and voice verification to deliver on even the most complex use cases. Get up and running fast with clear documentation, user-friendly developer tools, comprehensive data reports, and the white-glove customer service.

High Quality, Direct-To-Carrier Routes

TeleSign’s direct access to hundreds of carriers and waterfall approach across different routes ensures exceptional delivery and conversion rates.

Secure, Time-Based, One-Time Passcode (TOTP)

Block illegitimate accounts and verify users in real time with one-time SMS verification codes to authenticate identities and verify transactions.

Traffic Monitoring

Automatically flag anomalies in traffic type and volume to help prevent and fraud malicious attacks.

Reliable Global Coverage

Our extensive reach provides the most coverage and best-in-class message delivery to users in 87 countries and territories to keep your users protected, wherever they are.

Answering Machine OTP Delivery Prevention

Automatic answering machine detection prevents your one-time passcodes from being accidently left on vulnerable voicemail systems.

Dynamic CallerID

Use your preferred caller IDs so your customers know who is calling.

Verification in Action

Our phone number verification API offers fast, easy, and flexible SMS and voice verification to deliver on even the most complex use cases. Get up and running fast with clear documentation, user-friendly developer tools, comprehensive data reports, and the white-glove customer service.

Trusted by Top Companies

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“Working with TeleSign allowed us to quickly and effectively integrate SMS text messaging into our application.”

Rob Bauman
Director, Partner Engagement & Operations
EA

“We needed a partner that could scale to support our ever-expanding global footprint. TeleSign delivered the scale we were looking for.”

Chuck Mortimore
VP, Product Management, Identity, and Security
Salesforce
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User Registrations

Send new customers a one-time SMS or voice passcode to verify that they are the person who just registered for an account.

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Password Resets

Stop account theft in its tracks and ensure that only your customers can reset their passwords by providing a one-time SMS or voice passcode to the user’s phone before approving any password changes. 

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Transaction Confirmation

Verify customers’ transactions with a one-time passcode sent via SMS or voice, which they can use to confirm the purchase or transfer.

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Trusted Security

Two-factor authentication is the foundation of fraud prevention and account security. Prevent fraudulent account creation and make sure that your digital community is safe, secure, and streamlined with easy to implement one-time passcodes and two-factor authentication.

MAIN BENEFITS

Strengthen Authentications & Reduce Fraud

Instant API access to ongoing and accurate key phone number and user identity data attributes to help make better decisions about new registrations, user activity and fraud risks.

Verify Transactions

Ensure your users are who they say and stay PDS2 compliant when customers change important account information, access credit card details, transfer funds, or make payments.

Protect End-User Accounts

Secures accounts from compromise using voice-based OTPs on any phone type, on a global scale.

Prevent Fake Users

Mitigate new account registration fraud and attempts at bulk account creation.

Reach Landline Phones

Enables global reach of users who do not wish to receive SMS-based messages and/or provided a number that is not equipped to receive them.

Get started

We needed a partner that could scale to support our ever expanding global footprint. TeleSign delivered the scale we were looking for.

Chuck Mortimore

VP, Product Management, Identity, and Security, Salesforce

How We Verify

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Resources

Verification

Verification Datasheet

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Verification Datasheet

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2019 Year In Review

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2019 Year In Review

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Teletalks: Digital Identity For Seamless Onboarding

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Teletalks: Digital Identity For Seamless Onboarding

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Talk To An Expert

Interested in learning about how TeleSign's identity and engagement solutions can prevent fraud while fostering secure and global growth for your business? Let's chat.

PRODUCTS

ScorePhoneIDSMSVoiceVerificationRCSMessaging APIWhatsApp APIPhone NumbersNumber Masking

INDUSTRIES

Financial ServicesGamingeCommerceSocial NetworkingOn-demand Services

USE CASES

Streamline Account RegistrationAdd Two-factor AuthenticationKnow Your CustomerPrevent Account TakeoverReduce Fake AccountsCustomer EngagementDeliver Appointment & Event RemindersBuild Two-way CommunicationsEstablish Trusted IdentitiesHost Peer-to-peer CommunicationsVerify Phone NumbersSend MessagesMinimize Fraudulent TransactionsEnable Secure Account Recovery

RESOURCES

DeveloperBlogResearch LibrarySupport

PARTNERS

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