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TeleSign connects and protects the customer experience by deriving intelligence from billions of digital interactions and mobile signals. Through developer-friendly APIs that deliver user verification, digital identity, and dynamic-risk scoring, we help the world's largest brands secure onboarding, maintain account integrity, prevent fraud, and streamline customer engagement.

See how it works

Customer testimonial

At Affirm, we have the best algorithms for evaluating financial risk, and TeleSign has the best digital identity data to recognize possible fraud.

Head of Financial Partnerships, Affirm


Phone Data


Improve the accuracy and fidelity of your user verification intelligence. PhoneID unlocks detailed and actionable global phone number and subscriber data intelligence to strengthen authentications, evaluate fraud risks, and enhance the user experience.

Phone ID flow
See the PhoneID API in action.


Real-time risk scores empower you to block potential fraud before it happens – all with just a phone number. Telesign’s Intelligence delivers a numerical risk assessment, comprehensive reason codes, and intelligent recommendations. Determine risk thresholds based on your business needs and easily integrate the risk model into your existing security and fraud prevention workflows.

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