Best Mobile Identity Software

Telesign provides phone number, SMS and identity verification APIs, built around a Trust Engine that scores the risk of an interaction using digital and behavioural signals before a verification message is even sent.

Scoring the number before sending is the distinction that separates Telesign from a plain messaging provider, and it has direct commercial consequences. A one-time passcode sent blindly to any number a form accepts is how international revenue share fraud works: attackers drive traffic to premium numbers they profit from, and the victim is the company paying for the messages. Assessing the number first stops that spend rather than reporting it afterwards.

Silent verification is the capability worth understanding for user experience. Confirming possession of a phone number through the carrier connection, without asking anyone to read and retype a code, removes the friction of a step that is otherwise the most-abandoned point in any signup flow, while remaining stronger evidence than a code that can be read aloud to a social engineer.

The fraud coverage is stated by attack vector rather than as a general claim, naming international revenue share fraud, bots and fake users, synthetic identity fraud and account takeover, each of which needs different signals. Products divide into Intelligence for risk assessment, Identity for real-time signals, and Verify with SMS, silent and omnichannel options. A Trust Certified badge is offered. Industry material covers financial services, enterprise software, ecommerce, travel, entertainment and on-demand applications. A pricing page for SMS and voice exists but published no figures in the captured page.

iProov is a UK-based biometric identity verification company whose core product, iProov Face Verifier, delivers what it calls Genuine Presence Assurance, confirming a user is the right person, a real person, and authenticating in real time. Its patented Flashmark technology uses a controlled illumination sequence during face capture to detect replay attacks, injection attacks, and deepfakes without requiring the user to move or complete cognitive challenges. A faster Express Liveness mode is also available for lower risk, everyday authentication.

iProov is independently certified to ISO/IEC 30107-3 levels 1 and 2, FIDO Face Verification, and NIST 800-63-4, and has been tested by Five Eyes governments and the US Department of Homeland Security. Pricing is not published; iProov sells to governments, banks, and large enterprises through direct sales engagement, so organizations must contact iProov for a custom quote.

Twilio is a cloud communications platform that gives developers APIs to add messaging, voice calling, video, email, and authentication features to their applications. Core products include Programmable SMS and MMS, Voice, Video, WhatsApp and RCS messaging, the SendGrid Email API, and Verify for two-factor authentication, alongside Flex for building contact centers and Segment for customer data management. Companies including Uber, Airbnb, Netflix, and HubSpot use Twilio to power customer communications.

Pricing is usage-based rather than flat subscription tiers: SMS costs around $0.0083 per message, voice starts near $0.0085 per minute to receive, and phone numbers start around $1.15 per month, with volume discounts at scale. SendGrid Email offers a free plan for up to 100 emails per day, and Twilio provides a free trial with no credit card required for new developers to test the platform.

Vonage Communications APIs (formerly Nexmo) is a cloud platform for adding SMS, voice, video, and authentication features into websites and applications. Businesses use its SMS, Messages, Voice, Video, and Verify APIs to reach customers across SMS, MMS, RCS, WhatsApp, and Facebook Messenger, or to build in-app calling and video experiences on Vonage's carrier-grade global network spanning over 1,600 telecom networks.

Pricing is pay-as-you-go and billed per second or per message, with no fixed monthly fee for API access, and free trial credit is available with no credit card required. Vonage is part of Ericsson and serves developers and enterprises building customer engagement, fraud prevention, and contact center tools.

Sinch is a Swedish cloud communications platform offering SMS, Voice, Email, and WhatsApp Business APIs that let developers embed messaging and calling into their products. Its Conversation API connects to more than a dozen channels, including RCS, Facebook Messenger, Instagram, and Viber, through a single integration, with automatic fallback to SMS if a richer channel fails to deliver.

Sinch charges on a pay-as-you-go basis, with US SMS starting at $0.0078 per message and outbound voice from $0.01 per minute, alongside its no-code Sinch Engage messaging platform, which offers a free trial. The company operates over 600 direct carrier connections and serves businesses from startups to large enterprises worldwide.

Infobip is a global cloud communications platform, founded in Croatia, that provides SMS, WhatsApp, RCS, Voice, Video, and Email APIs along with higher-level products such as Moments for marketing automation, Answers for AI chatbots, and Conversations for cloud contact centers. It owns and operates much of its own carrier infrastructure, with more than 800 direct-to-carrier connections across 190-plus countries.

Infobip does not publish standard pricing tiers; instead it quotes rates based on channel mix, message volume, and destination country, though a 60-day free trial gives new users 100 free messages per channel plus 15 free voice calls. It primarily serves mid-market and enterprise customers alongside developers building on its CPaaS X API stack.

Prove is a digital identity verification platform built around the phone number, covering onboarding through Prove Pre-Fill, instant account activation, identity verification with Prove Verified User, returning customer recognition through Unified Authentication, and bot defence through Prove Human Assurance.

Pre-Fill is the capability that shows what phone-centric identity actually buys, and the effect on conversion is the whole argument. Asking a new customer to type a name, address, date of birth and identity number into a form on a phone is where most digital onboarding fails, because every field is an opportunity to abandon. Verifying possession of the phone number and populating those fields from authoritative data turns the form into a confirmation, which converts far better while being harder to fake, not easier.

That last point deserves stating clearly, because pre-filling sounds like a security compromise. A fraudster with a stolen identity can type the details correctly; what they generally cannot do is possess the phone number cryptographically tied to that identity's history with the carrier. The phone becomes evidence rather than a convenience.

Human Assurance addresses the newer problem of automated account creation at scale, which matters more now that generating plausible synthetic applications is cheap. Prove Pre-Fill for Business extends the same approach to onboarding companies rather than individuals, which is a harder problem because a business identity has officers, ownership and registration behind it. Rates are not published.

BTS Mobile ID is the mobile identity product within BTS Group's communications platform, sitting alongside one-time passcodes, silent SMS authentication, branded calls and number anonymisation, and sold to mobile operators, hyperscalers and communications platform providers as well as to end businesses.

Selling to operators rather than only to businesses is the structural difference and it determines what the product can see. Mobile identity signals originate inside carrier networks, and a vendor working with the operators has access to the authoritative source rather than to a resold aggregate. BTS offers Managed Mobile ID as a service for operators to run, which is a different business from selling verification calls.

Number anonymisation and branded calls address the same underlying collapse in telephone trust from opposite directions. Branded calling attaches a verified identity to an outbound call so a customer knows who is ringing, which matters because unidentified calls now go unanswered as a matter of routine. Anonymisation hides the real numbers of two parties connected through a marketplace, so a driver and a customer can speak without either learning the other's number.

The wider platform covers application-to-person messaging and its monetisation, cloud numbers, programmable communications, eSIM, voice biometrics, speech-to-text, conversational AI and anti-fraud profiling of both voice calls and SMS traffic. A white label campaign manager is offered for operators and contact centres, with the S1 Platform providing analytics and quality of experience measurement, and BTS LAB doing the research. Rates are not published.

Entrust Identity Verification is the platform formerly sold as Onfido, acquired by Entrust and folded into its wider identity portfolio. It supports around 2,500 document types with smart capture, active and passive liveness, face matching and one to many known face search, which allows a new applicant to be checked against previously seen faces to catch repeat fraud attempts.

Its Workflow Studio lets teams assemble and change verification journeys without engineering work, which is a practical advantage when compliance requirements shift or you need different flows per market. Built in KYC and AML screening covers sanctions, PEP and adverse media. Onfido was long regarded as having one of the stronger developer experiences in this category, and the SDK and documentation quality carried into Entrust.