Insights

Market Leadership Callsign has been recognized as a leader in product usability and trust by Javelin Strategy & Research, positioning it as a preferred partner for organizations seeking high-fidelity user verification solutions.

Strategic Partnerships Recent collaborations with Visa and SpecTrust highlight opportunities to expand fraud prevention and authentication services into banking and fintech sectors, appealing to financial institutions investing in digital security.

Innovative Technology Using proprietary AI-driven recognition that mimics human identification, Callsign offers scalable, privacy-focused identity solutions ideal for clients aiming to reduce fraud without compromising user experience.

Regulatory Compliance Partnerships with organizations like The Knoble and deployments of dynamic interventions demonstrate Callsign’s capacity to address compliance and access control needs, especially for sensitive data environments.

Growth and Adoption With a revenue range of up to $50 million and a growing global footprint, Callsign presents a compelling opportunity for enterprise clients seeking reliable, innovative digital trust solutions in a competitive cybersecurity landscape.

Callsign Tech Stack

Callsign uses 8 technology products and services including Hotjar, PostgreSQL, Kubernetes Operations, and more. Explore Callsign's tech stack below.

  • Hotjar
    Analytics
  • PostgreSQL
    Database
  • Kubernetes Operations
    Deployment
  • tcpdump
    Network Management
  • macOS
    Operating Systems & Computing Languages
  • Kotlin
    Programming Languages
  • Android
    Programming Languages
  • RabbitMQ
    Software Framework

Media & News

Callsign's Email Address Formats

Callsign uses at least 1 format(s):
Callsign Email FormatsExamplePercentage
First.Last@callsign.comJohn.Doe@callsign.com
96%
First.Middle@callsign.comJohn.Michael@callsign.com
3%
First@callsign.comJohn@callsign.com
1%

Frequently Asked Questions

Where is Callsign's headquarters located?

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Callsign's main headquarters is located at London, England United Kingdom. The company has employees across 4 continents, including EuropeAsiaNorth America.

What is Callsign's phone number?

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You can contact Callsign's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Callsign's official website and social media links?

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Callsign's official website is callsign.com and has social profiles on LinkedInCrunchbase.

What is Callsign's SIC code NAICS code?

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Callsign's SIC code is 4813 - Telephone Communications, Except Radiotelephone NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does Callsign have currently?

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As of April 2026, Callsign has approximately 273 employees across 4 continents, including EuropeAsiaNorth America. Key team members include Chief Revenue Officer: L. C.Chief Information Officer: A. P.Chief Revenue Officer: S. O.. Explore Callsign's employee directory with LeadIQ.

What industry does Callsign belong to?

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Callsign operates in the Computer and Network Security industry.

What technology does Callsign use?

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Callsign's tech stack includes HotjarPostgreSQLKubernetes OperationstcpdumpmacOSKotlinAndroidRabbitMQ.

What is Callsign's email format?

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Callsign's email format typically follows the pattern of First.Last@callsign.com. Find more Callsign email formats with LeadIQ.

When was Callsign founded?

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Callsign was founded in 2011.

Callsign

Computer and Network SecurityEngland, United Kingdom201-500 Employees

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.

Section iconCompany Overview

Headquarters
London, England United Kingdom
Phone number
SIC Code
4813 - Telephone Communications, Except Radiotelephone
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2011
Employees
201-500

Section iconFunding & Financials

  • $25M$50M

    Callsign's revenue is estimated to be in the range of $25M$50M

Section iconFunding & Financials

  • $25M$50M

    Callsign's revenue is estimated to be in the range of $25M$50M

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