Company lists · Data refreshed September 2026

Top 22 Information security consultants based in the United Kingdom

RevenueBase identified 1,794 company matches for information security consultants associated with the United Kingdom as of September 2026 and tracks 18,645 professional contacts across them, including 5,070 with verified work emails and 984 with mobile numbers. London is the largest hub.

This list covers company matches for information security consultants 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 September 3, 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 Sep 3, 2026 How this list was built
1,794Companies
18,645Contacts tracked
5,070Verified emails
984Mobile numbers
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The 22 largest information security consultants based in the United Kingdom

Ranked by team size
Top 22 of 1,794 company matches for information security consultants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 3, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 3, 2026n/a698 contacts →

Exact match

“Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
2Exact matchReading, United KingdomHQ recorded Sep 3, 2026201-500304 contacts →

Exact match

“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
3Exact matchDurham, United KingdomHQ recorded Sep 3, 2026201-500223 contacts →

Exact match

“We are an IT business with a difference.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 3, 2026201-500188 contacts →

Exact match

“Intragen is a cyber security business focused on managed Identity solutions and services.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 3, 2026n/a186 contacts →

Exact match

“IT support for businesses in London.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
6Exact matchManchester, United KingdomHQ recorded Sep 3, 2026201-500173 contacts →

Exact match

“FourNet transforms the customer and citizen services people rely on every day.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
7Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 3, 202651-200165 contacts →

Exact match

“Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
8Exact matchThatcham, United KingdomHQ recorded Sep 3, 202651-200160 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 · Sep 3, 2026 · View company records in RevenueBase
9Exact matchBradley Stoke, United KingdomHQ recorded Sep 3, 2026201-500142 contacts →

Exact match

“Logiq is a UK-based cyber security consultancy and secure managed services provider supporting defence, government, and critical national infrastructure (CNI) organisations where…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-200123 contacts →

Exact match

“We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-200118 contacts →

Exact match

“Bulletproof is now part of WorkNest Secure.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20099 contacts →

Exact match

“OryxAlign creates true alignment that delivers the right outcomes for all.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 3, 2026201-50097 contacts →

Exact match

“As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
14Exact matchGuildford, United KingdomHQ recorded Sep 3, 202651-20092 contacts →

Exact match

“ramsac provide so much more than just IT support.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20087 contacts →

Exact match

“ITC Secure is an advisory-led cyber security services company.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
16Exact matchStourport-on-severn, United KingdomHQ recorded Sep 3, 2026201-50086 contacts →

Exact match

“CyberGuard Technologies is the security division of Wavenet.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
17Exact matchLeeds, United KingdomHQ recorded Sep 3, 202651-20085 contacts →

Exact match

“Solutions | Testing | Knowledge Helping You Protect Your Business From Cyber Attackers Your security and compliance partner, delivering trust worldwide Cognisys are your trusted…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
18Exact matchBasingstoke, United KingdomHQ recorded Sep 3, 202611-5084 contacts →

Exact match

“Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
19Exact matchWaterloo, United KingdomHQ recorded Sep 3, 202651-20080 contacts →

Exact match

“At Reliance Cyber, we believe in truly partnering with our customers.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
20Exact matchReading, United KingdomHQ recorded Sep 3, 202651-20080 contacts →

Exact match

“Established in 2005, URM Consulting is a specialist provider of cyber and information security consultancy, training, and assurance services.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 3, 20261,001-5,00078 contacts →

Exact match

“We offer a broad portfolio of IT and consulting services covering Governance and Strategy, Cloud, Data, Cybersecurity, Infrastructure and Applications, Managed IT and Security.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
22Exact matchBristol, United KingdomHQ recorded Sep 3, 202651-20076 contacts →

Exact match

“Synoptix was formed in 2011 to provide engineering solutions across various technical industries.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase

Showing 22 of 1,794 information security consultants based in the United Kingdom

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Information security consultants based in the United Kingdom at a glance

As of Sep 3, 2026
27.2%Verified-email coverage
5.3%Mobile-number coverage
10.4Average contacts per company
1-10Median size (employees)
38.0%Largest-city concentration · London
Sep 3, 2026Page data refreshed

Companies by employee count

1-10
1,205
11-50
432
51-200
107
201-500
25
501-1,000
8
1,001-5,000
1
5,001-10,000
1
10001+
1

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 “information security consultants” 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 5,070 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 September 3, 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.

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 “information security consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security consultants are there based in the United Kingdom?

RevenueBase identified 1,794 company matches for information security consultants associated with the United Kingdom as of September 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?

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

Which city has the most information security consultants?

London leads with 682 company records, followed by Manchester (53) and Birmingham (30).

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 5,070 professional contacts with verified work emails tracked across these 1,794 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 September 3, 2026.

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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.