Insights

Strategic Partnerships Leverage Callsign’s recent alliance with Ooredoo Qatar to position digital identity and fraud prevention as a bundled offering for mobile operators and their enterprise clients in the Middle East and Gulf regions.

Financial Strength Target mid-market and enterprise clients with growing cybersecurity budgets by highlighting a revenue range of 25 to 50 million and a funding presence of 39 million to validate scale and stability.

Identity Leadership Position Callsign’s high-fidelity biometric-like digital trust ( Swipe or Type with 99.999% accuracy) to organizations needing seamless authentication and fraud reduction across financial services, fintech, and telco sectors.

Industry Recognition Use recognition as Leader in Javelin’s 2024 Authentication and Identity-Proofing Vendor Solutions Scorecard and status as a Representative Vendor to build credibility when approaching CIOs, CISOs, and product leaders.

Ecosystem Fit Highlight compatibility with modern tech stacks (Cloud, Kubernetes, Jira, New Relic, Google Cloud) to reassure prospects in regulated industries about deployment, observability, and security governance.

Similar companies to Callsign

Callsign Tech Stack

Callsign uses 8 technology products and services including Grafana, Kubernetes, Microsoft SharePoint, and more. Explore Callsign's tech stack below.

Media & News

Callsign's Email Address Formats

Callsign uses at least 3 email formats:
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

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 LinkedIn and Crunchbase.

How much revenue does Callsign generate?

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As of August 2026, Callsign's annual revenue is estimated to be $25M - $50M.

What is Callsign's NAICS code?

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Callsign's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does Callsign have currently?

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As of August 2026, Callsign has approximately 278 employees across 4 continents, including Europe, Asia and North America. Key team members include Chief Information Officer: A. P., Chief Revenue Officer: S. O. and 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 Grafana, Kubernetes, Microsoft SharePoint, Google Workspace, Jamf Pro, Google Cloud, Atlassian Jira and New Relic.

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.

How much funding has Callsign raised to date?

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As of August 2026, Callsign has raised $39M in funding. The last funding round occurred on Apr 27, 2021.

When was Callsign founded?

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Callsign was founded in 2011.
Callsign logo

Callsign

Computer and Network SecurityEngland, United Kingdom201-500 Employees

Callsign is a London, England, United Kingdom-based company in the computer and network security industry, employing between 201 and 500 people. It develops digital-trust solutions that mimic human identification to distinguish genuine users, aiming to provide privacy and security with minimal friction while blocking bad actors. The company reports that its user recognition can reach up to 99.999% accuracy. It has formed partnerships with Visa in 2023 and with State Talking in 2026, and was named a Leader in Product Vitals in Javelin Strategy & Research's 2024 Authentication and Identity-Proofing Vendor Solutions Scorecard. Reported revenue is in the range of $25 million to $50 million, and its technology stack includes Zipkin, Continuous Delivery, XML, DocuSign, Microsoft Office, Ruby, Scala, and Google Tag Manager.

Section iconCompany Overview

Phone number
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2011
Employees
201-500

Section iconFunding & Financials

  • $39M

    Callsign has raised a total of $39M of funding over 6 rounds. Their latest funding round was raised on Apr 27, 2021 as a Venture Round.

  • $25M - $50M

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

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