Insights

Strong Industry Recognition Callsign has been recognized as a leader in authentication and identity-proofing, which enhances its credibility and positions it as a trusted partner for organizations seeking advanced digital security solutions.

Strategic Partnerships Recent collaborations with Visa and other tech firms indicate opportunities to expand into financial services and fintech sectors that require secure, user-friendly authentication methods for their digital channels.

Market Expansion Potential Callsign’s recent launches and global partnerships demonstrate growth initiatives that can be leveraged to introduce its proprietary digital trust technology to new international markets, especially in areas vulnerable to fraud.

Customer-Centric Technology The company’s focus on privacy-preserving user recognition with high accuracy aligns with increasing demand for compliant and frictionless identity verification solutions across financial and enterprise sectors.

Competitive Positioning With a revenue range of $25 million to $50 million and recognition among smaller and mid-sized players, Callsign can position itself as a flexible, high-fidelity security provider suitable for organizations looking to upgrade their fraud prevention infrastructure.

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 March 2026, Callsign has approximately 273 employees across 4 continents, including EuropeAsiaNorth America. Key team members include Chief Information Officer: A. P.Chief Revenue Officer: S. O.Chief Security Officer: I. C. C.. 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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