OverviewSuggest Edit

Сallsign provides secure and seamless authentication experience for enterprises and users. The Company's Intelligence Driven Authentication Solution enables more adaptive access control decisions, putting enterprises and their users back in control. Сallsign's platform uses multiple layers to recognize users through deep learning-based upon location, behavior, device, and biometrics.

HQLondon, GB
Employee Ratings4.1

Latest Updates

Employees (est.) (Jan 2020)124(-3%)

Key People/Management at Callsign

Zia Hayat

Zia Hayat

Founder & CEO
Ian Welch

Ian Welch

Sarah Whipp

Sarah Whipp

Helene Vieyra

Helene Vieyra

SVP Global Human Resources
Paul Fletcher

Paul Fletcher

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Callsign Office Locations

Callsign has an office in London
London, GB (HQ)
150 Cheapside
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Callsign Financials and Metrics

Summary Metrics

Founding Date


Callsign total Funding

$38.8 m

Callsign latest funding size

$35 m

Time since last funding

2 years ago

Callsign investors

Callsign's latest funding round in July 2017 was reported to be $35 m. In total, Callsign has raised $38.8 m
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Callsign Revenue

GBPFY, 2014FY, 2015FY, 2016FY, 2017FY, 2018



Accounts Receivable


Current Assets

Y, 2018

Financial Leverage

-0.1 x
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Callsign Online and Social Media Presence

Embed Graph

Callsign News and Updates

City Moves for 19 July – Who’s switching jobs at Foundry, Callsign and Saga?

Today’s City Moves includes Foundry, Callsign and Saga. Foundry Foundry, which develops creative software for the digital design, media and [...] The post City Moves for 19 July – Who’s switching jobs at Foundry, Callsign and Saga? appeared first on CityAM.

Lloyds Bank to roll out Callsign digital ID product

Callsign has today announced that it will be working with Lloyds Banking Group on providing digital...

Callsign Blogs

Avoiding Business Imbalance

Society is fast becoming digital first, and mobile banking adoption is increasing year on year. This transition is bringing in a wave of whole new set of challenges, especially when it comes to identification. From shifting customer expectations, with many expecting tailored, personalize…

Who owns your digital identity? Think it’s you, think again

Over the last year I have had conversations with governments, think tanks, influencers, companies such as banks, telco’s, media, and actual people about digital identity. I have been astonished at the first major hurdle – defining what digital identity is.  People of course, have the bro…

Product Revenue Fit vs. Product Market Fit

Technology is amazing, for many it’s an equalizer, bringing the world to our doorstep - regardless of where our doorstep is; all the good, the knowledge, the services. It’s also brought all the bad - the unit economics of fraud have been optimized to the extent it touches most income gro…

Balance Security and User Experience with Intelligence Driven Authentication

The digital world is based on a simple premise – trust. When we’re interacting with a person or entity –whether it’s a business or some other transactional interface – we need to know with no uncertainty they are who they say they are, doing what they say they are, where they say they ar…

Webinar: How to improve security without impacting your customers

Finding the right balance between security and user experience is a challenge for any organization. Both employees and customers are increasingly looking for improved security and privacy, but above all, are expecting a frictionless experience.
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Callsign Frequently Asked Questions

  • When was Callsign founded?

    Callsign was founded in 2012.

  • Who are Callsign key executives?

    Callsign's key executives are Zia Hayat, Ian Welch and Sarah Whipp.

  • How many employees does Callsign have?

    Callsign has 124 employees.

  • Who are Callsign competitors?

    Competitors of Callsign include SecureAuth, OneSpan and BehavioSec.

  • Where is Callsign headquarters?

    Callsign headquarters is located at 150 Cheapside, London.

  • Where are Callsign offices?

    Callsign has an office in London.

  • How many offices does Callsign have?

    Callsign has 1 office.