Callsign is a pioneering company in the digital identity and authentication space. It leverages deep learning, artificial intelligence, behavioral biometrics, and multi-factor authentication to help organizations definitively recognize genuine users, protecting against fraud and ensuring secure, seamless access. Callsign's intelligence-driven authentication platform is designed for enterprises, particularly in financial services, e-commerce, and government sectors, to build trust, enhance user experience, and meet regulatory requirements. Their core mission is to make digital identification simple and secure for everyone.
The London headquarters serves as the central hub for Callsign's global operations, including executive leadership, product strategy, research and development, engineering, and core business functions.
Located in a modern building in the vibrant South Bank area, offering contemporary office facilities designed to foster collaboration and innovation. Specific architectural details are typical of modern, high-spec office developments.
Callsign cultivates a dynamic and innovative work culture, emphasizing problem-solving, technological advancement, and collaboration. As a company in the cybersecurity and identity sector, there's a strong focus on precision, security, and agility.
The London HQ is significant due to its proximity to a rich talent pool, major financial institutions, and a thriving tech ecosystem, enabling Callsign to stay at the forefront of the digital identity industry and serve its global clientele effectively.
Callsign supports a global client base with functions such as sales, customer success, engineering, and research & development distributed across its key office locations in Europe, the Middle East, Asia-Pacific, and North America. The company is focused on serving industries like financial services, e-commerce, and government entities worldwide, providing them with advanced intelligence-driven authentication solutions.
10 York Road
London
England
United Kingdom
Address: Abu Dhabi Global Market (ADGM), Abu Dhabi, UAE (Specific street address not publicly listed)
To drive market penetration, provide localized support, and foster strategic partnerships across the MEA region, a key growth market for digital services.
Address: Singapore (Specific street address not publicly listed)
To cater to the growing demand for secure digital identity solutions in the diverse APAC market and build relationships with regional clients and partners.
Address: New York, NY (Specific street address not publicly listed)
To expand Callsign's footprint in North America, a key market for digital identity, fraud prevention technologies, and financial services.
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As of April 2025, Callsign' leadership includes:
Callsign has been backed by several prominent investors over the years, including:
Callsign has undergone a significant leadership refresh in the past 12 months, with key appointments including a new CEO, CFO, CPO, CRO, and CMO. Founder Zia Hayat transitioned from CEO to a Non-Executive Director role.
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Callsign likely uses common corporate email formats for its employees. The most prevalent patterns usually involve combinations of the employee's first name, last name, or initials.
[first].[last]@callsign.com
Format
jane.doe@callsign.com
Example
80%
Success rate
Finextra • March 26, 2024
Callsign announced the appointment of Martin Krajewski as its new Chief Executive Officer. Krajewski, who previously served as a Non-Executive Director on Callsign's board, brings extensive experience to lead the company into its next phase of growth....more
Callsign Blog • March 19, 2024
Callsign announced its recognition in the 2024 Gartner Magic Quadrant for Identity Verification. This acknowledgment highlights Callsign's position and capabilities in the evolving digital identity landscape....more
Callsign Blog • November 14, 2023
Callsign welcomed Tim Joyce as its new Chief Financial Officer. Joyce brings a wealth of experience in financial leadership and is set to drive Callsign's financial strategy and growth....more
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