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Changing the face of digital identity

Callsign’s mission is is to seamlessly power the identification of every web, mobile and physical interaction. How are we doing this? By building the technologies that will empower every transaction and put identity at the heart of every experience.

The Callsign manifesto

Every element of our digital environment is becoming defined by personalization, speed, customer-centricity and efficiency. Customers expect solutions that are fluid, intuitive, and inherently secure, as well as impeccable data responsibility. And if a business can’t deliver that, those customers will be quick to switch to one that does.

What’s at the core of this digital life? In a word, trust. It needs to be at the heart of every interaction, every transaction, every digital experience. But currently, digital trust is broken.

Watch the video Meet Callsign

Callsign is changing that. We’re helping businesses build their online journeys around the individuals and their identities in a positive and proactive way – using their unique characteristics to make their digital lives smoother whilst preserving trust and respecting privacy.

Simply put, we’re bringing security and service together in pursuit of a common goal that values trust, eliminates fraud, and builds a better, fairer digital world for everyone.

Technology leaders

Our solutions and technology stand head and shoulders above anything else in the market. And that’s because we hire the brightest, most inquisitive minds – the people who want to change the rules of identity, and make digital trust a reality for everyone.


Tomorrow’s technology, today

Innovation is at our soul and center. Technologies such as our behavioral biometrics are changing the identity game for everyone.

A team
of experts

Expertise on tap

From AI to UX, security to machine learning: our ever-expanding team of experts constantly challenge the boundaries of what’s possible.


Ethical AI at the core of what we do

Privacy is of paramount importance. We ensure that our solutions are compliant and respect the confidentiality of the data that they handle.

Our values

We strongly believe our values are what set us apart, and we continually work across our entire organization to embody them – ensuring that they’re a true reflection of us on our best days.

Passionate about privacy. Inspired by identity. Driven by trust.

Sounds like you? Come and join the team

Ethical AI &
privacy conscious

When it comes to digital identity, the ongoing evolution of technologies such as artificial intelligence and machine learning raises important questions around privacy – and rightly so.

We believe that privacy is of the utmost importance, and our technologies embody that belief, providing robust identification and authorization whilst preserving privacy.

Built-in privacy

Our bespoke data obfuscation and anonymization techniques analyze against behaviors – not individuals themselves.

Users first

Callsign keeps users safe from bad actors with stolen credentials attempting to impersonate them.

Fully compliant

Our solutions are designed to be compliant with existing and future privacy regulations.

A brief

It’s 1994, and Vladimir Leonidovitch Levin has just attempted the biggest bank heist the world had ever seen via dial-up internet. Zia Hayat, Callsign CEO and founder, realizes that cyber crime is here to stay – and he resolves to help combat the rising threat.

One first class degree and a PhD thesis later, Zia has designed secure information systems for BAE Systems, Accenture Consulting and Lloyds Banking Group. But he understands that to make a real impact on identity solutions, he’ll need to set up his own company dedicated to the cause... and so, Callsign is born.

Key dates

2012: Genesis

Zia Hayat founds Callsign in London with his business partner, Ian Welch. With just seven employees, our mission is clear: create the most intelligent authentication solution on the market, and help businesses keep the digital identities of employees safe and verified.

2014: Home is where...

Callsign moves to its first permanent office space in Moorgate, London. The first two years are spent building and testing the initial Callsign concept with a number of Fortune 500 companies.

2016: Moving on up

We now have over 40 employees onboard; and we’ve deployed our technology to hundreds of thousands of users. By this point, we have tested and refined the Callsign solution with banks and governments, amongst others.

2017: Series A

We secure our Series A funding round: $35 million. In a paradigm shift, we begin rolling out a customer-facing version of the Callsign solution, paving the way to bring empowering digital identity to everyone.

2018: The world beckons

Expansion continues. With over 100 employees, Callsign moves to prestigious new offices overlooking St. Paul’s Cathedral and establishes footholds in the USA and Australia, as well as winning customer authentication contracts, and partnering with Microsoft, Temenos and Intel.

2021: The future of identity

With more and more major businesses adopting the Callsign solution; we open offices in the UAE and Singapore. Our Identity First event brings together the finest minds across industry and academia to tackle the challenges of digital trust and how we can build a better, more equitable future for everyone.

We're changing the rules of identity

Stop reacting to change, stay in front.