Verify mobile numbers using SIM security

Remove friction and account fraud caused by passwords. Add tru.ID network-based verification using mobile number and SIM to secure your users, employees and enhance 2FA.

Hand holding mobile phone with tru.ID verification
Hand holding mobile phone with tru.ID verification

In partnership with

Why tru.ID?

Ubiquitous mobile identity. Delightful user experience.
Cryptographic security.  

The mobile number and SIM is a powerful pairing and a strong possession factor. tru.ID makes it possible to embed SIM-based mobile verification into any account journey, and so address the many UX and security problems of password-based access management.

a mobile phone with sim card shaped as a lock
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Only real mobile identities
no more fake, spoofed, recycled or virtual mobile numbers
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Stronger 2FA than SMS OTP
replace SMS OTP or magic links for strong, seamless and silent 2FA/MFA
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Zero user effort
no more forgotten passwords, app switching to register or login, or auth codes to input
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a URL-based lookup for zero trust, zero knowledge, and no PII
How does tru.ID work?

Verification that works seamlessly, like magic.

tru.ID verification APIs use the user's mobile network, which already knows the phone number via the SIM card in the device. tru.ID matches the phone number by creating a mobile data session to a one-time URL from the end-user's device. Build seamless account journeys and stronger 2FA.

How does tru.ID work?
hand touching tru.ID logo on a mobile device

Connects to mobile networks in real-time

tru.ID’s partners with global mobile network operators to provide access to their authentication systems. If your business uses the mobile phone number as a credential – be it as part of registration, or access login, tru.ID looks up the number, matches it to the network, and asks – is this a valid subscriber? If the network replies ‘yes’, tru.ID returns a positive response. It's a URL-based lookup with no personal data exchanged.

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Seamless SIM-based authentication

tru.ID verifies the user’s mobile number with the SIM card identity, a pairing that is unique and near impossible to copy or tamper with. We call this pairing SIM-based authentication. There’s nothing more the user needs to do than enter their mobile phone number, which is checked against the network's SIM authentication using a URL-based lookup over a data connection.

A developer-first global API platform

Until tru.ID, access to network-level authentication systems was only available to the mobile operators themselves, or to enterprise customers. tru.ID changed all that and built a developer-first API platform. Integrate once, then scale as you expand, be it nationally or globally, supported by comprehensive guides and tutorials for Android, iOS, ReactNative, and Web.

Any sufficiently advanced technology is indistinguishable from magic. Arthur C. Clarke

Are you reviewing your auth solutions? Looking for alternatives to SMS 2FA? Curious about our technology? We'll show you in just 30 minutes how tru.ID can help.


Mobile Authentication, Reimagined

The password is an anachronism, SMS OTP is outdated and open to fraud, auth apps are cumbersome, and dongles get lost. It's time to build a new standard of account journeys - smooth and secure. Embed tru.ID APIs into registration, login, access, step-up verification or wherever there's a mobile number.

Instant PhoneCheck for account registration

Let your customers spend more time using your app, not registering or logging into it. No more forgotten passwords, SMS OTP, or email links. Use Instant PhoneCheck to verify mobile phone numbers instantly and invisibly, transforming onboarding UX for good.

Go to Instant PhoneCheck >

Active SIMCheck for fraud prevention

Add SIM-based authentication to your weaponry against SIM swap fraud. Use Active SIMCheck to fortify your existing 2FA method, detect recent account changes, and protect your customers and your brand from the risks of account takeover.

Go to Active SIMCheck >

Strong SubscriberCheck for account accesss

Get the full package: transform your user journeys with all the above benefits and more. Use Strong SubscriberCheck to get ready for Strong Customer Authentication (SCA) requirements. This API is your ultimate toolkit for the next generation of account-related user journeys.

Go to Strong SubscriberCheck >
Built for developers

Carrier-grade verification now open for all

The team's deep telecommunications expertise drives us to democratise access to the same verification technology that carriers use themselves, with a simple, familiar tech stack that's easy to integrate.


A simple set of RESTful APIs and libraries for your platform and technology of choice, which do all the heavy lifting, so adding our verification takes you minutes, not months.

illustration of tru.ID, sim card and carrier network

Data privacy compliant

tru.ID has regional data privacy baked into it, so we are compliant in Europe for GDPR for example. You can also configure your app data residency.

Zero-trust security

Our platform is purpose-built for security from the ground-up; enabling you to add zero-trust authentication to your app, through zero-knowledge APIs.

Enterprise-level reliability

Our infrastructure scales with your growing verification needs, and as we add new networks or countries they are seamlessly available to you as well.

ROI Calculator

How is your conversion? 
Calculate the upside of switching to tru.ID for a dramatic boost to user onboarding.

Your standard onboarding UX may be losing you up to 30% of potential customers. What if you could save them?

ROI Calculator

How is your conversion? 
Calculate the upside of switching to tru.ID for a dramatic boost to user onboarding.

Your standard onboarding UX may be losing you up to 30% of potential customers. What if you could save them?

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