Callsign

callsign.com

computer & network security

callsign.com

London, England, United Kingdom

201-500 employees

58100000 revenue

LinkedIn Profile

About Callsign

multifactor authentication, cyber security, realtime identification, twofactor authentication 2fa, tfa, fraud & security prevention plan, psd2, identity, access management, identity management, account takeover prevention, strong customer authentication, biometric authentication, computer & network security, information technology & services, privacy

Callsign's Tech Stack

AI/ML

Decision Makers at Callsign

3 contacts

Adrien Pujol

Chief Information Officer

a***@callsign.com Sign up to view

Luke Hammond

Engineering Manager at Callsign | Engineering Leader

l***@callsign.com Sign up to view

Zeeshan Qureshi

Global VP Of Engineering

z***@callsign.com Sign up to view

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11 technologies detected · 3 decision makers · Emails available

Sales Outreach Angle

CRMs like Salesforce signal an active sales operation. Companies using Salesforce are strong targets for sales training, RevOps tools, data enrichment, and Salesforce integrations.

Callsign's Position in the StackWho Database

• Callsign is 1 of 4,889 computer & network security companies tracked in StackWho.
• 4,875 computer & network security companies in our database have verified decision-maker emails (100% of the cohort).
• 47,721 companies in England are in the StackWho database.
• 134 computer & network security companies are in the 201-500 employee range (same size as Callsign).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated August 2026.

Frequently Asked Questions

What technology does Callsign use?

Callsign uses Salesforce, Route 53, Amazon SES, Outlook, Atlassian Cloud, Google Analytics Ecommerce Tracking, and 5 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Callsign?

StackWho has verified email addresses for 3 decision makers at Callsign. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Callsign directly for sales, recruiting, or partnerships.

What industry is Callsign in?

Callsign operates in the computer & network security industry, headquartered in London, England, United Kingdom. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Callsign's contact data?

Yes. StackWho Pro members can export decision maker contact data for Callsign and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.