SMS and Voice Verification

Secure, single-use voice or SMS verification codes add reliable security to your systems. With 700+ direct-to-carrier routes, you can deliver a safe customer experience anywhere on the globe. 

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Protect account access 
Prevent fake users
Verify transactions

Security you can count on

Multifactor authentication (MFA) is the foundation of fraud prevention and account security. Make sure your customers and your platform are safe, secure, and streamlined with easy to implement one-time passcodes (OTPs) and MFA. 

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.

Secure user logins

Seamlessly identify and flag suspicious users and prevent fraudulent activity with accurate global verification data and key user identity attributes.

Verify across multiple channels 

Eliminate registration fraud and attempts to create spam accounts in bulk by requiring multifactor authentication with one-time SMS or voice passcodes to verify your customer’s identity. 

Authenticate transactions 

Verify high-value transactions with a one-time passcode sent via SMS or voice and stay PDS2 compliant when customers change important account information, access credit card details, transfer funds, or make payments.

SMS and Voice Verification in action

Our phone number verification API offers fast, easy, and flexible SMS and voice verification to address the most complex use cases. We offer clear documentation, user-friendly developer tools, comprehensive data reports, and 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)

Verify users in real time with SMS one-time passcodes to authenticate a known user, verify a transaction, or block fraudsters from opening fake accounts.

Traffic monitoring

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

Reliable global coverage

Reach and ensure message delivery to end-users in over 200 countries and territories and in 87 different languages.

Voicemail detection

Automatic voicemail detection ensures a live user is receiving the passcode by requiring users press a key to hear the voice message, reducing the risk of stolen codes and account breaches.

Dynamic caller ID

Send phone calls from dedicated virtual numbers/caller IDs to ensure numbers are recognizable to end users. 

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

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Chuck Mortimore
,
VP, Product Management, Identity, and Security

Salesforce delivers mobile verification

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