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Callsign Information

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Callsign is pioneering digital trust through proprietary technology that uniquely mimics the way humans identify each other in the real world. Positive identification of genuine users delivers privacy, safety and minimal friction whilst ensuring that bad actors are blocked. Through a simple Swipe or Type, users can be personally recognized to a 99.999% accuracy, delivering the highest fidelity AI based user recognition for the digital world.

Website http://www.callsign.com
Revenue $67.4 million
Funding $38.8 million
Employees 275 (227 on RocketReach)
Founded 2011
Technologies
Industry Software, Computer and Network Security, Security Software, Artificial Intelligence, Software Development & Design, Data and Analytics, Science and Engineering, Computer, Consumer Electronics, Hardware, Cyber Security, Information Technology, Privacy and Security, Machine Learning, Network Security
Web Rank 1 Million
Keywords Digital Identity Verification, Identity Proofing, Digital Identity, User Authentication, User Verification, Identity Verification Solutions, Digital Trust, Secure Authentication, Online Identity, Identity Management, Authentication Solutions, Secure Identity, Privacy Enhancing Technologies, Fraud Prevention, Access Management, Identity As A Service, Biometric Authentication, Cybersecurity, Data Security, Risk Management
Competitors Microsoft, Okta, Twilio, IBM, Ping Identity, SailPoint, OneLogin by One Identity, Duo Security, Auth0 by Okta, Authy +37 more (view full list)
SIC SIC Code 73 Companies, SIC Code 737 Companies
NAICS NAICS Code 518 Companies, NAICS Code 51 Companies, NAICS Code 511 Companies, NAICS Code 5112 Companies

Callsign Questions

The Callsign annual revenue was $67.4 million in 2026.

Ian Welch is the Co-Founder and Chief Operating Officer of Callsign.

227 people are employed at Callsign.

Callsign is based in London, England.

The NAICS codes for Callsign are [518, 51, 511, 5112].

The SIC codes for Callsign are [73, 737].

Top Callsign Employees

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