Company lists · Data refreshed November 2026

Top 23 Telecom cybersecurity software companies based in the United Kingdom

Name: Telecom cybersecurity software companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 184 companies tracked

RevenueBase identified 184 company matches for telecom cybersecurity software companies associated with the United Kingdom as of November 2026 and tracks 3,903 professional contacts across them, including 1,210 with verified work emails. London is the largest hub.

This list covers company matches for telecom cybersecurity software companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

184Companies

3,903Contacts tracked

1,210Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 23 largest telecom cybersecurity software companies based in the United Kingdom

Ranked by team size

Top 23 of 184 company matches for telecom cybersecurity software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Quorum Cyber	Exact match	Edinburgh, United KingdomHQ recorded Nov 5, 2026	201-500	276 contacts →
	Exact match “At Quorum Cyber, we're on a mission to help good people win.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Cyberfort	Exact match	Thatcham, United KingdomHQ recorded Nov 5, 2026	51-200	161 contacts →
	Exact match “At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	RED Sift	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	108 contacts →
	Exact match “Red Sift enables organizations to anticipate, respond to, and recover from cyber attacks while continuing to operate effectively.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Titania LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	96 contacts →
	Exact match “Dedicated to securing the networks society depends on.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Becrypt	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	75 contacts →
	Exact match “With a heritage of creating National Cyber Security Centre certified products, Becrypt, a Leonardo company, is a trusted provider of endpoint cybersecurity software solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Eset UK	Exact match	Bournemouth, United KingdomHQ recorded Nov 5, 2026	51-200	68 contacts →
	Exact match “We help businesses and individuals stay protected in an increasingly complex digital world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Talk Straight Group	Exact match	Ilkley, United KingdomHQ recorded Nov 5, 2026	11-50	59 contacts →
	Exact match “Talk Straight has been looking after the communications and network security for thousands of public and private sector organisations since 2007.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Garrison NOW A Part Of Everfox	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	57 contacts →
	Exact match “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Coretech Security	Exact match	Cheltenham, United KingdomHQ recorded Nov 5, 2026	51-200	46 contacts →
	Exact match “CoreTech is a specialist cyber security company whose people are motivated by the desire to deliver exceptional capabilities coupled with a real sense of mission.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Threatscape	Exact match	Dublin, United KingdomHQ recorded Nov 5, 2026	11-50	42 contacts →
	Exact match “We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Omerta	Exact match	Saffron Walden, United KingdomHQ recorded Nov 5, 2026	51-200	38 contacts →
	Exact match “Omerta - A Global Security Technology and Services Company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Nothreat	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	35 contacts →
	Exact match “The future of IoT/OT security is here.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Cyberwhiz IOT Cyber Security	Exact match	Cheltenham, United KingdomHQ recorded Nov 5, 2026	11-50	33 contacts →
	Exact match “At CyberWhiz, we build next-generation IoT Cyber Security solutions across the three pillars of IoT, which are Edge·Mobile·Cloud.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Torrid Networks Limited	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	32 contacts →
	Exact match “Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Cyb3r	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	30 contacts →
	Exact match “CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	4secure LTD	Exact match	Northampton, United KingdomHQ recorded Nov 5, 2026	11-50	25 contacts →
	Exact match “4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Liverton Security Limited	Exact match	Wellington, United KingdomHQ recorded Nov 5, 2026	11-50	24 contacts →
	Exact match “Liverton Security is a trusted cybersecurity provider specialising in secure email solutions and information security consulting.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Clearswift	Exact match	Berkshire, United KingdomHQ recorded Nov 5, 2026	201-500	18 contacts →
	Exact match “Why Clearswift?” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Signum Intelligence	Exact match	Uk, United KingdomHQ recorded Nov 5, 2026	11-50	18 contacts →
	Exact match “Signum Intelligence is a leading UK based solutions provider in the security, information, and telecommunications sector.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Exfo Ontology	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	17 contacts →
	Exact match “EXFO Ontology is revolutionising how telecommunication network operators get to know their networks – and through this, their customers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Cyberhive	Exact match	Newbury, United KingdomHQ recorded Nov 5, 2026	11-50	15 contacts →
	Exact match “CyberHive protects the most valued organisations, their people data, and assets, with patented technology that is simple, secure and performant.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Tranchulas	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	15 contacts →
	Exact match “Founded in 2006, Tranchulas is a multinational cyber security company having its offices in London, San Francisco, Budapest and Islamabad.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Assuria LTD	Exact match	Reading, United KingdomHQ recorded Nov 5, 2026	11-50	13 contacts →
	Exact match “Assuria provides trusted cyber security software solutions and managed security services that power Security Operations Centres, IT Protective Monitoring services and IT Assurance…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “telecom cybersecurity software companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 23 of 184 telecom cybersecurity software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,210 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Telecom cybersecurity software companies based in the United Kingdom at a glance

As of Nov 5, 2026

31.0%Verified-email coverage

21.2Average contacts per company

11-50Median size (employees)

41.8%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 184 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “telecom cybersecurity software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 1,210 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Telecom cybersecurity software companies by metro

Telecom cybersecurity software companies in London77

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “telecom cybersecurity software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many telecom cybersecurity software companies are there based in the United Kingdom?

RevenueBase identified 184 company matches for telecom cybersecurity software companies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Quorum Cyber tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most telecom cybersecurity software companies?

London leads with 77 company records, followed by Manchester (6) and Birmingham (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,210 professional contacts with verified work emails tracked across these 184 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 184 telecom cybersecurity software companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Telecom cybersecurity software companies by geography

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.