Company lists · Data refreshed October 2026
Top 25 Information security consultancies based in the United Kingdom
RevenueBase identified 1,743 company matches for information security consultancies associated with the United Kingdom as of October 2026 and tracks 16,040 professional contacts across them, including 5,397 with verified work emails. London is the largest hub.
This list covers company matches for information security consultancies 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 October 1, 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.
The 25 largest information security consultancies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 705 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 2 | 351 contacts → | ||||
Exact match “S-RM is a global intelligence and cyber security consultancy.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 3 | 326 contacts → | ||||
Exact match “As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 4 | 303 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 5 | 260 contacts → | ||||
Exact match “We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 6 | 243 contacts → | ||||
Exact match “Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 7 | 242 contacts → | ||||
Exact match “Obrela Security Industries is a global provider of cyber security services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 8 | 215 contacts → | ||||
Exact match “We are an IT business with a difference.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 9 | 186 contacts → | ||||
Exact match “IT support for businesses in London.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 10 | 168 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 11 | 159 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 12 | 156 contacts → | ||||
Exact match “Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 13 | 156 contacts → | ||||
Exact match “CDS Defence & Security is a technical consultancy working to enhance operational effectiveness and bring about behavioural change in the defence sector.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 14 | 143 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 15 | 134 contacts → | ||||
Exact match “Turnkey Consulting brings together people, protection, and performance to help the world’s leading companies understand and optimize their risk and security landscape.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 16 | 133 contacts → | ||||
Exact match “CyberIAM provides the expertise needed for the design and implementation of complex Identity and access management systems.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 17 | 126 contacts → | ||||
Exact match “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 18 | 123 contacts → | ||||
Exact match “Bulletproof is now part of WorkNest Secure.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 19 | 97 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 20 | 93 contacts → | ||||
Exact match “ramsac provide so much more than just IT support.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 21 | 90 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 22 | 87 contacts → | ||||
Exact match “ITC Secure is an advisory-led cyber security services company.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 23 | 86 contacts → | ||||
Exact match “CyberGuard Technologies is the security division of Wavenet.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 24 | 85 contacts → | ||||
Exact match “C3IA Solutions is a UK based Small Medium Enterprise specialising in the specification, design, test & acceptance, risk management and operational service delivery of secure…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 25 | 85 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 · Oct 1, 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 “information security consultancies”. 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 25 of 1,743 information security consultancies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 5,397 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Information security consultancies based in the United Kingdom at a glance
As of Oct 1, 2026Companies by employee count
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 1,743 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 “information security consultancies” 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 5,397 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 October 1, 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.
Information security consultancies by metro
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 consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many information security consultancies are there based in the United Kingdom?
RevenueBase identified 1,743 company matches for information security consultancies associated with the United Kingdom as of October 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 consultancies?
London leads with 604 company records, followed by Manchester (48) and Leeds (28).
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 5,397 professional contacts with verified work emails tracked across these 1,743 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 October 1, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,743 information security consultancies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Information security consultancies by geography
- Information security consultancies based in Buenos Aires, Argentina
- Information security consultancies based in Adelaide, Australia
- Information security consultancies based in Brisbane, Australia
- Information security consultancies based in Canberra, Australia
- Information security consultancies based in Melbourne, Australia
- Information security consultancies based in Sydney, Australia
- Information security consultancies based in Vienna, Austria
- Information security consultancies based in Belo Horizonte, Brazil
- Information security consultancies based in Brasilia, Brazil
- Information security consultancies based in Curitiba, Brazil
- Information security consultancies based in Porto Alegre, Brazil
- Information security consultancies based in Rio De Janeiro, Brazil
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Information security consultancies based in Buenos Aires, Argentina
- Information security consultancies based in Adelaide, Australia
- Information security consultancies based in Brisbane, Australia
- Information security consultancies based in Canberra, Australia
- Information security consultancies based in Melbourne, Australia
- Information security consultancies based in Sydney, Australia
Company intelligence · public preview
Top 25 information security consultancies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,743 matching company records for information security consultancies based in the United Kingdom, with 16,040 tracked contacts and 5,397 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 1, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 information security consultancies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  COBRAaudit.amazingsupport.co.ukHQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 705 contacts → |
“Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  S-Rms-rminform.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 351 contacts → |
“S-RM is a global intelligence and cyber security consultancy.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Reliance Infosystemsreliance.systemsHQ: West End, United KingdomReported employees: 201-500 | West End, United Kingdom | 201-500 | Exact match | 326 contacts → |
“As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Bridewellbridewell.comHQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 303 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Xalientxalient.comHQ: Leeds, United KingdomReported employees: 201-500 | Leeds, United Kingdom | 201-500 | Exact match | 260 contacts → |
“We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  ROC Technologiesroctechnologies.comHQ: Greenham, United KingdomReported employees: 201-500 | Greenham, United Kingdom | 201-500 | Exact match | 243 contacts → |
“Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Obrelaobrela.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 242 contacts → |
“Obrela Security Industries is a global provider of cyber security services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Waterstonswaterstons.comHQ: Durham, United KingdomReported employees: 201-500 | Durham, United Kingdom | 201-500 | Exact match | 215 contacts → |
“We are an IT business with a difference.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  operum.techoperum.techHQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 186 contacts → |
“IT support for businesses in London.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Sapphiresapphire.netHQ: Newcastle Upon Tyne, United KingdomReported employees: 51-200 | Newcastle Upon Tyne, United Kingdom | 51-200 | Exact match | 168 contacts → |
“Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Cyberfortcyberfortgroup.comHQ: Thatcham, United KingdomReported employees: 51-200 | Thatcham, United Kingdom | 51-200 | Exact match | 159 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Performantaperformanta.comHQ: Maidenhead, United KingdomReported employees: 51-200 | Maidenhead, United Kingdom | 51-200 | Exact match | 156 contacts → |
“Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  CDS Defence & Securitycdsds.ukHQ: Cheltenham, United KingdomReported employees: 51-200 | Cheltenham, United Kingdom | 51-200 | Exact match | 156 contacts → |
“CDS Defence & Security is a technical consultancy working to enhance operational effectiveness and bring about behavioural change in the defence sector.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  LOGIQlogiq.co.ukHQ: Bradley Stoke, United KingdomReported employees: 201-500 | Bradley Stoke, United Kingdom | 201-500 | Exact match | 143 contacts → |
“Logiq is a UK-based cyber security consultancy and secure managed services provider supporting defence, government, and critical national infrastructure (CNI) organisations where…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Turnkey Consultingturnkeyconsulting.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 134 contacts → |
“Turnkey Consulting brings together people, protection, and performance to help the world’s leading companies understand and optimize their risk and security landscape.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Cyberiamcyberiam.comHQ: Chester, United KingdomReported employees: 51-200 | Chester, United Kingdom | 51-200 | Exact match | 133 contacts → |
“CyberIAM provides the expertise needed for the design and implementation of complex Identity and access management systems.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Trpglobaltechriskpartners.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 126 contacts → |
“We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Bulletproof Cyber Securityworknest.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 123 contacts → |
“Bulletproof is now part of WorkNest Secure.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Caretower An Integrity360 Companyintegrity360.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 97 contacts → |
“As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Ramsacramsac.comHQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 93 contacts → |
“ramsac provide so much more than just IT support.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Cognisyscognisys.co.ukHQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 90 contacts → |
“Solutions | Testing | Knowledge Helping You Protect Your Business From Cyber Attackers Your security and compliance partner, delivering trust worldwide Cognisys are your trusted…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  ITC Secureitcsecure.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 87 contacts → |
“ITC Secure is an advisory-led cyber security services company.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Wavenet Cyberguardwavenetuk.comHQ: Stourport-on-severn, United KingdomReported employees: 201-500 | Stourport-on-severn, United Kingdom | 201-500 | Exact match | 86 contacts → |
“CyberGuard Technologies is the security division of Wavenet.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  C3iac3ia.co.ukHQ: Poole, United KingdomReported employees: 51-200 | Poole, United Kingdom | 51-200 | Exact match | 85 contacts → |
“C3IA Solutions is a UK based Small Medium Enterprise specialising in the specification, design, test & acceptance, risk management and operational service delivery of secure…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Amethyst Risk Managementamethystrisk.comHQ: Basingstoke, United KingdomReported employees: 11-50 | Basingstoke, United Kingdom | 11-50 | Exact match | 85 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,743 company matches
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Information security consultancies: dataset insights
October 1, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,741 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,743 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 1, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Information security consultancies by metro
Questions about this company list
What does Exact match mean for information security consultancies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many information security consultancies did RevenueBase find based in the United Kingdom?
The saved snapshot records 1,743 matching company records, 16,040 tracked contacts and 5,397 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 1, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Information security consultancies by geography
- Information security consultancies based in Buenos Aires, Argentina
- Information security consultancies based in Adelaide, Australia
- Information security consultancies based in Brisbane, Australia
- Information security consultancies based in Canberra, Australia
- Information security consultancies based in Melbourne, Australia
- Information security consultancies based in Sydney, Australia
- Information security consultancies based in Vienna, Austria
- Information security consultancies based in Belo Horizonte, Brazil
- Information security consultancies based in Brasilia, Brazil
- Information security consultancies based in Curitiba, Brazil
- Information security consultancies based in Porto Alegre, Brazil
- Information security consultancies based in Rio De Janeiro, Brazil
Cite this list
RevenueBase Data Team. Top 25 information security consultancies based in the United Kingdom. Snapshot: October 1, 2026. https://revenuebase.ai/companies/information-security-consultancies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Information security consultancies based in Buenos Aires, Argentina
- Information security consultancies based in Adelaide, Australia
- Information security consultancies based in Brisbane, Australia
- Information security consultancies based in Canberra, Australia
- Information security consultancies based in Melbourne, Australia
- Information security consultancies based in Sydney, Australia
Company intelligence · public preview
Top 25 information security consultancies based in the United Kingdom
RevenueBase records 1,743 matching company records for information security consultancies based in the United Kingdom, with 16,040 tracked contacts and 5,397 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 1, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 information security consultancies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | COBRAaudit.amazingsupport.co.uk HQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 705 contacts → |
“Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | S-Rms-rminform.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 351 contacts → |
“S-RM is a global intelligence and cyber security consultancy.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Reliance Infosystemsreliance.systems HQ: West End, United KingdomReported employees: 201-500 | West End, United Kingdom | 201-500 | Exact match | 326 contacts → |
“As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Bridewellbridewell.com HQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 303 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Xalientxalient.com HQ: Leeds, United KingdomReported employees: 201-500 | Leeds, United Kingdom | 201-500 | Exact match | 260 contacts → |
“We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ROC Technologiesroctechnologies.com HQ: Greenham, United KingdomReported employees: 201-500 | Greenham, United Kingdom | 201-500 | Exact match | 243 contacts → |
“Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Obrelaobrela.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 242 contacts → |
“Obrela Security Industries is a global provider of cyber security services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Waterstonswaterstons.com HQ: Durham, United KingdomReported employees: 201-500 | Durham, United Kingdom | 201-500 | Exact match | 215 contacts → |
“We are an IT business with a difference.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | operum.techoperum.tech HQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 186 contacts → |
“IT support for businesses in London.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Sapphiresapphire.net HQ: Newcastle Upon Tyne, United KingdomReported employees: 51-200 | Newcastle Upon Tyne, United Kingdom | 51-200 | Exact match | 168 contacts → |
“Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cyberfortcyberfortgroup.com HQ: Thatcham, United KingdomReported employees: 51-200 | Thatcham, United Kingdom | 51-200 | Exact match | 159 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Performantaperformanta.com HQ: Maidenhead, United KingdomReported employees: 51-200 | Maidenhead, United Kingdom | 51-200 | Exact match | 156 contacts → |
“Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | CDS Defence & Securitycdsds.uk HQ: Cheltenham, United KingdomReported employees: 51-200 | Cheltenham, United Kingdom | 51-200 | Exact match | 156 contacts → |
“CDS Defence & Security is a technical consultancy working to enhance operational effectiveness and bring about behavioural change in the defence sector.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | LOGIQlogiq.co.uk HQ: Bradley Stoke, United KingdomReported employees: 201-500 | Bradley Stoke, United Kingdom | 201-500 | Exact match | 143 contacts → |
“Logiq is a UK-based cyber security consultancy and secure managed services provider supporting defence, government, and critical national infrastructure (CNI) organisations where…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Turnkey Consultingturnkeyconsulting.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 134 contacts → |
“Turnkey Consulting brings together people, protection, and performance to help the world’s leading companies understand and optimize their risk and security landscape.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Cyberiamcyberiam.com HQ: Chester, United KingdomReported employees: 51-200 | Chester, United Kingdom | 51-200 | Exact match | 133 contacts → |
“CyberIAM provides the expertise needed for the design and implementation of complex Identity and access management systems.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Trpglobaltechriskpartners.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 126 contacts → |
“We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Bulletproof Cyber Securityworknest.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 123 contacts → |
“Bulletproof is now part of WorkNest Secure.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Caretower An Integrity360 Companyintegrity360.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 97 contacts → |
“As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Ramsacramsac.com HQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 93 contacts → |
“ramsac provide so much more than just IT support.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Cognisyscognisys.co.uk HQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 90 contacts → |
“Solutions | Testing | Knowledge Helping You Protect Your Business From Cyber Attackers Your security and compliance partner, delivering trust worldwide Cognisys are your trusted…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | ITC Secureitcsecure.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 87 contacts → |
“ITC Secure is an advisory-led cyber security services company.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Wavenet Cyberguardwavenetuk.com HQ: Stourport-on-severn, United KingdomReported employees: 201-500 | Stourport-on-severn, United Kingdom | 201-500 | Exact match | 86 contacts → |
“CyberGuard Technologies is the security division of Wavenet.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | C3iac3ia.co.uk HQ: Poole, United KingdomReported employees: 51-200 | Poole, United Kingdom | 51-200 | Exact match | 85 contacts → |
“C3IA Solutions is a UK based Small Medium Enterprise specialising in the specification, design, test & acceptance, risk management and operational service delivery of secure…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Amethyst Risk Managementamethystrisk.com HQ: Basingstoke, United KingdomReported employees: 11-50 | Basingstoke, United Kingdom | 11-50 | Exact match | 85 contacts → |
“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 description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Information security consultancies: dataset insights
October 1, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,741 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,743 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 1, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Information security consultancies by metro
Questions about this company list
What does Exact match mean for information security consultancies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many information security consultancies did RevenueBase find based in the United Kingdom?
The saved snapshot records 1,743 matching company records, 16,040 tracked contacts and 5,397 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 1, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Information security consultancies by geography
- Information security consultancies based in Buenos Aires, Argentina
- Information security consultancies based in Adelaide, Australia
- Information security consultancies based in Brisbane, Australia
- Information security consultancies based in Canberra, Australia
- Information security consultancies based in Melbourne, Australia
- Information security consultancies based in Sydney, Australia
- Information security consultancies based in Vienna, Austria
- Information security consultancies based in Belo Horizonte, Brazil
- Information security consultancies based in Brasilia, Brazil
- Information security consultancies based in Curitiba, Brazil
- Information security consultancies based in Porto Alegre, Brazil
- Information security consultancies based in Rio De Janeiro, Brazil
Cite this list
RevenueBase Data Team. Top 25 information security consultancies based in the United Kingdom. Snapshot: October 1, 2026. https://revenuebase.ai/companies/information-security-consultancies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Information security consultancies based in Buenos Aires, Argentina
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