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 Ratings4.5

Latest Updates

Employees (est.) (Jul 2021)260(+2%)
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

4 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

Consumer privacy concerns increase by almost a third during Covid-19 pandemic as password confidence drops

33% of those who feel their privacy concerns have increased say this is because they don’t know what data is being collected about them, and 29% say it’s because they’ve shared more as they access more online services than before. Only 36% of UK consumers claim they’re confident in…

Apple takes the first bite of the cookie

Apple's latest update has far-reaching implications Apple, the undisputed master of the granular update, has raised more than a few eyebrows with the rollout of iOS 14.5. With the debut of App Tracking Transparency, Apple has reversed the default position on in-app tracking from opt-out…

Tackling APP fraud with the FCA Digital Sandbox

Callsign recently participated in the FCA and City of London Digital Sandbox pilot, where we worked alongside industry experts to develop our approach to tackling APP fraud. The Digital Sandbox Pilot, which ran from November 2020 to February 2021, was set up to support innovative firms…

Global digital identity pioneer, Callsign chooses UAE as a global center of technical excellence

Press ReleaseCallsign, the digital identity pioneer, has established an engineering and development site in Abu Dhabi. In line with the UAE's Vision 2071 for a nation that places digital transformation at the heart of the national strategy, Callsign is building a world-class engineering …

Callsign names Singapore as APAC Headquarters

Callsign the global digital identity pioneer has named Singapore as the company headquarters for the Asia Pacific region. The headquarters will expand throughout 2021 establishing both business development and customer support teams to better serve customers in regions with local talent …

We need to talk about… your authentication framework

Authentication is a hot topic. We all know that to win in the digital world, organizations must make their services both simple to use and secure.
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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 260 employees.

  • Who are Callsign competitors?

    Competitors of Callsign include Clear, Daon and SecureAuth.

  • 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.