SMS Verify

Secure SMS verification on a global scale

Secure SMS verification on a global scale

Secure, single-use SMS verification codes add reliable protection to your business and customers. Deliver phone-based verification and MFA using a time-based, one-time passcodes (OTPs) sent via SMS.

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Protect account access 
Prevent fake users
Verify transactions
Protect account access 
Verify transactions
Prevent fake users

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. 

Reduce fraud

Validate and authenticate legitimate users and prevent fraud—from sign-up to log out.

Verify everyone, everywhere

Protect customers no matter where in the world they’re located​.

Reliability you can trust

Reach your customers with confidence through more than 700 direct-to-carrier routes.

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Reduce fraud

Safeguard your customer accounts

Prevent fraud and keep your customers and business secure. From new account sign-ups to customer sign-ins, enable MFA for critical interactions. Go one-step further and catch account takeover risks with SIM Swap and call forwarding detection and prevent communication fraud with IRSF intelligence.

Verify everyone, everywhere

Unmatched global coverage

Verify just about everyone. Telesign’s verification API reaches 97% of the world’s population. Authenticate your customers across 230 countries and over 80 languages. Effortlessly grow and scale your business with turn-key geo-expansion.

Reliability you can trust

High quality, direct-to-carrier routes

Don’t leave your customers waiting. Telesign’s SMS Verify API intelligently routes OTPs to provide you the fastest and most reliable verification possible. And with our waterfall delivery, dynamic routing ensures every OTP is delivered across our global network of more than 700 carrier routes.

Secure your platform with a few lines of code

Our easy-to-use messaging API and in-depth documentation makes it quick and easy to start messaging your customers.


curl --request POST \
     --url https://rest-ww.telesign.com/v1/verify/sms \
     --header 'accept: application/json' \
     --header 'content-type: application/x-www-form-urlencoded' \
     --data phone_number=15558675309

SMS Verification you and your customers will trust

Waterfall approach

Send SMS verification codes across multiple channels and languages for greater flexibility. Telesign’s direct access to hundreds of carriers and waterfall approach across different routes ensures exceptional delivery rates with minimal latency.

Number insights

Leverage phone number data intelligence to strengthen user verification, reduce fake accounts, inform risk models and improve conversions and accuracy of collected information

Traffic monitoring

Traffic monitoring automatically flags traffic type and volume anomalies to prevent communication fraud and malicious attacks. Adjust and split traffic based on type of traffic across multiple route providers, to swiftly reduce message fail rates. 

Sim swap detection

Confirm SIM swap status to block or allow SMS verification. Leverage Telesign's network of SIM swap coverage in 16 countries and more than 40 MNOs directly integrated into solutions.

Phone number cleansing

Don't let international dialing rules negatively impact your delivery rate! SMS Verify automatically cleanses phone numbers by adding or removing leading digits in the phone numbers based on country, city and message type.

IRSF detection

Detect and minimize financial losses from International Revenue Share Fraud (IRSF). Telesign’s risk assessment model layers into your verification work flows and blocks messages to fraudulent numbers and spam.

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Meta business partner

Telesign has been welcomed as a Badged WhatsApp Partner.

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FAQ

What is SMS verification?

SMS verification confirms a user's identity by asking them to input a code that has been sent to their mobile phone.

Why is SMS verification used?

SMS verification is used to confirm a user’s identity and to protect from fraud.

How does SMS verification work?

When a user signs up for a new account, they are asked to input their mobile phone number. A code is then sent to the user's mobile phone, and they are asked upon registration and future log in attempts to confirm identity.

What are the benefits of SMS verification?

  1. Helps to prevent fraud and confirms a user's identity
  2. Adds an extra layer of security to your account
  3. Verifies the authenticity of messages and emails