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 2021)196(+7%)
Cybersecurity ratingAMore

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 offices in London and Palo Alto
London, GB (HQ)
1 Bartholomew Cl
Palo Alto, CA, US
2225 E Bayshore Rd
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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

3 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

FY, 2014

Financial Leverage

-0.2 x
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Callsign Cybersecurity Score

Cybersecurity ratingPremium dataset



SecurityScorecard logo

Callsign Online and Social Media Presence

Embed Graph

Callsign News and Updates

Cyber firm Callsign set to unveil bumper JP Morgan backing

London-based identity fraud firm Callsign is said to be on the verge of unveiling fresh funding worth tens of millions [...] The post Cyber firm Callsign set to unveil bumper JP Morgan backing appeared first on CityAM.

Callsign names Amir Nooriala chief strategy officer

Callsign, a London-based company at the forefront of the identity, authentication and authorisation...

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

The Battle for the Bots: Tackling the Chatbot Challenge

Chatbots have evolved significantly – and rapidly – in the last few years. They’re becoming increasingly ubiquitous, intelligent and useful. They’re also becoming something of a risk.

How the bots (Might) Steal Christmas

One of the many traditions of the festive season is to frown on that person, the one who does all of their shopping early; whilst everyone else is scouring the web for those must-have gifts, they already had everything wrapped and under the tree on December 1st.

We need to talk about… Application Fraud

In a recent report* the Aite Group outlined in detail the threats and challenges posed to financial services institutions from application fraud. The report brings up detailed and pertinent considerations, making it a must read for any fraud and security professional.

Leading Open Banking UK Platforms, Callsign and Ozone, partner to fast-track compliance with newly required OBF API standards

Callsign, a company powering the rapidly evolving world of digital identification, and Ozone, the leading standards based platform for open banking, have partnered to align their authentication, orchestration, and open banking capabilities in Bahrain as a single integration, following th…

Is it time for Zero Trust to replace VPN?

For the last 20 years, Virtual Private Networks (VPNs) have been instrumental in enabling people to work remotely. VPNs allow users to use the public infrastructure of the internet to securely connect to private networks (such as their employer’s systems). These capabilities have, until …

The case for combining security, UX & being included in 3 Gartner Market Guides

The digital identity landscape is changing, particularly due to the impact 2020 has had on both workforce and consumer security. With this, businesses are starting to see the need for increased investment in digital identification technologies.
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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 196 employees.

  • Who are Callsign competitors?

    Competitors of Callsign include SecureAuth, OneSpan and AU10TIX.

  • Where is Callsign headquarters?

    Callsign headquarters is located at 1 Bartholomew Cl, London.

  • Where are Callsign offices?

    Callsign has offices in London and Palo Alto.

  • How many offices does Callsign have?

    Callsign has 2 offices.