Company lists · Data refreshed September 2026
Top 25 Security consulting firms based in London, United Kingdom
RevenueBase identified 559 company matches for security consulting firms associated with London, United Kingdom as of September 2026 and tracks 5,491 professional contacts across them, including 1,441 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers company matches for security consulting firms associated with London, 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 14, 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 security consulting firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 358 contacts → | ||||
Exact match “ASEL design, develop and deliver fully bespoke and integrated security solutions, seamlessly bringing together people, technology and processes to achieve results-driven outcomes.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 2 | 242 contacts → | ||||
Exact match “Obrela Security Industries is a global provider of cyber security services.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 3 | 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 · Sep 14, 2026 · View company records in RevenueBase | |||||
| 4 | 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 · Sep 14, 2026 · View company records in RevenueBase | |||||
| 5 | 123 contacts → | ||||
Exact match “Bulletproof is now part of WorkNest Secure.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 6 | 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 · Sep 14, 2026 · View company records in RevenueBase | |||||
| 7 | 87 contacts → | ||||
Exact match “ITC Secure is an advisory-led cyber security services company.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 8 | 82 contacts → | ||||
Exact match “Ark Workplace Risk is the trusted partner for organisations seeking to take control of their risk, compliance, and safety.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 9 | 78 contacts → | ||||
Exact match “Principle One provides Systems Engineering, Architecture and Business Consulting services within the Law Enforcement, National Security, Health and wider public sector.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 10 | 60 contacts → | ||||
Exact match “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 11 | 58 contacts → | ||||
Exact match “Assist Security Group (ASG) helps clients build resilient, comprehensive security strategies that protect their people and assets, business continuity and reputation.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 12 | 58 contacts → | ||||
Exact match “Black Diamond Security - Safeguarding Your World.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 13 | 52 contacts → | ||||
Exact match “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 14 | 51 contacts → | ||||
Exact match “Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 15 | 49 contacts → | ||||
Exact match “GSA Global helps organisations, families and individuals respond to serious, complex and emerging security risks.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 16 | 48 contacts → | ||||
Exact match “In today’s complex threat environment, businesses, individuals, and organisations require trusted partners to provide the ultimate assurance that their assets are well protected.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 17 | 44 contacts → | ||||
Exact match “CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 18 | 43 contacts → | ||||
Exact match “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 19 | 39 contacts → | ||||
Exact match “Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 20 | 39 contacts → | ||||
Exact match “SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 21 | 37 contacts → | ||||
Exact match “Audere Group is a London-headquartered holistic risk advisory company founded in 2014.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 22 | 36 contacts → | ||||
Exact match “Harod Associates delivers global investigation and security solutions to complex crime and risk issues.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 23 | 35 contacts → | ||||
Exact match “At VENOVOX, we are a premier consultancy in risk management and background screening, delivering specialised services in due diligence, security advisory, background checks, and…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 24 | 34 contacts → | ||||
Exact match “Our elite teams offer bespoke, integrated security solutions that adapt and react to the evolving threat landscape.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 25 | 33 contacts → | ||||
Exact match “Othrys is a global strategic and risk advisory firm founded in 2016.” Recorded in the RevenueBase company graph · Sep 14, 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 “security consulting firms”. 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 559 security consulting firms based in London, United Kingdom
See the full list, filter by size, metro and specialty, and access 1,441 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Security consulting firms based in London, United Kingdom at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 559 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 London, United Kingdom whose business descriptions match “security consulting firms” 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 1,441 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 14, 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.
Security consulting firms by metro in the United Kingdom
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 “security consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many security consulting firms are there based in London, United Kingdom?
RevenueBase identified 559 company matches for security consulting firms associated with London, 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?
Argenbright Security Europe Limited - Asel tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United Kingdom has the most security consulting firms?
London leads the United Kingdom with 559 company records, followed by Manchester (38) 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 1,441 professional contacts with verified work emails tracked across these 559 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 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 559 security consulting firms based in London, United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Security consulting firms by geography
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
- Security consulting firms based in Australia
- Security consulting firms based in the Netherlands
- Security consulting firms based in Mexico
- Security consulting firms based in Italy
- Security consulting firms based in Spain
- Security consulting firms based in South Africa
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
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
Company intelligence · public preview
Top 25 security consulting firms based in London, 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 559 matching company records for security consulting firms based in London, United Kingdom, with 5,491 tracked contacts and 1,441 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: September 14, 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 security consulting firms based in London, 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 | HQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 358 contacts → |
“ASEL design, develop and deliver fully bespoke and integrated security solutions, seamlessly bringing together people, technology and processes to achieve results-driven outcomes.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  ARK Workplace Riskarkworkplacerisk.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 82 contacts → |
“Ark Workplace Risk is the trusted partner for organisations seeking to take control of their risk, compliance, and safety.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Principle ONEprincipleone.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 78 contacts → |
“Principle One provides Systems Engineering, Architecture and Business Consulting services within the Law Enforcement, National Security, Health and wider public sector.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Dainttadaintta.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 60 contacts → |
“We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Assist Security Groupassistsecurity.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 58 contacts → |
“Assist Security Group (ASG) helps clients build resilient, comprehensive security strategies that protect their people and assets, business continuity and reputation.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Black Diamond Securityblackdiamondsecurity.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Hexegichexegic.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 52 contacts → |
“At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Custom Intelligent Securitycustomsecurity.tvHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 51 contacts → |
“Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  GSA Globalgsaglobal.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 49 contacts → |
“GSA Global helps organisations, families and individuals respond to serious, complex and emerging security risks.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Frankton Group LTDfranktongroup.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 48 contacts → |
“In today’s complex threat environment, businesses, individuals, and organisations require trusted partners to provide the ultimate assurance that their assets are well protected.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cornerstonecornerstonegrg.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Ak9 Security And FM Solutions LTDak9security.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Secforce LTDsecforce.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 39 contacts → |
“SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Audere Groupauderegroup.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 37 contacts → |
“Audere Group is a London-headquartered holistic risk advisory company founded in 2014.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  HARODharodassociates.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Harod Associates delivers global investigation and security solutions to complex crime and risk issues.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Venovoxvenovox.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 35 contacts → |
“At VENOVOX, we are a premier consultancy in risk management and background screening, delivering specialised services in due diligence, security advisory, background checks, and…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Team Fusion LTDteamfusion.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Our elite teams offer bespoke, integrated security solutions that adapt and react to the evolving threat landscape.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Othrysothrys.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 33 contacts → |
“Othrys is a global strategic and risk advisory firm founded in 2016.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 559 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Security consulting firms: dataset insights
September 14, 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
558 records in the displayed employee bands.
1 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 across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 559 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: September 14, 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 ↗
Security consulting firms by metro in the United Kingdom
Questions about this company list
What does Exact match mean for security consulting firms?
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 security consulting firms did RevenueBase find based in London, United Kingdom?
The saved snapshot records 559 matching company records, 5,491 tracked contacts and 1,441 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: September 14, 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
Security consulting firms by geography
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
- Security consulting firms based in Australia
- Security consulting firms based in the Netherlands
- Security consulting firms based in Mexico
- Security consulting firms based in Italy
- Security consulting firms based in Spain
- Security consulting firms based in South Africa
Cite this list
RevenueBase Data Team. Top 25 security consulting firms based in London, United Kingdom. Snapshot: September 14, 2026. https://revenuebase.ai/companies/security-consulting-firms/united-kingdom/london.
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
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
Company intelligence · public preview
Top 25 security consulting firms based in London, United Kingdom
RevenueBase records 559 matching company records for security consulting firms based in London, United Kingdom, with 5,491 tracked contacts and 1,441 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: September 14, 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 security consulting firms based in London, 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 | HQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 358 contacts → |
“ASEL design, develop and deliver fully bespoke and integrated security solutions, seamlessly bringing together people, technology and processes to achieve results-driven outcomes.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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 · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | ARK Workplace Riskarkworkplacerisk.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 82 contacts → |
“Ark Workplace Risk is the trusted partner for organisations seeking to take control of their risk, compliance, and safety.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Principle ONEprincipleone.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 78 contacts → |
“Principle One provides Systems Engineering, Architecture and Business Consulting services within the Law Enforcement, National Security, Health and wider public sector.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Dainttadaintta.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 60 contacts → |
“We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Assist Security Groupassistsecurity.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 58 contacts → |
“Assist Security Group (ASG) helps clients build resilient, comprehensive security strategies that protect their people and assets, business continuity and reputation.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Black Diamond Securityblackdiamondsecurity.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Hexegichexegic.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 52 contacts → |
“At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Custom Intelligent Securitycustomsecurity.tv HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 51 contacts → |
“Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | GSA Globalgsaglobal.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 49 contacts → |
“GSA Global helps organisations, families and individuals respond to serious, complex and emerging security risks.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Frankton Group LTDfranktongroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 48 contacts → |
“In today’s complex threat environment, businesses, individuals, and organisations require trusted partners to provide the ultimate assurance that their assets are well protected.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cornerstonecornerstonegrg.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Ak9 Security And FM Solutions LTDak9security.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Secforce LTDsecforce.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 39 contacts → |
“SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Audere Groupauderegroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 37 contacts → |
“Audere Group is a London-headquartered holistic risk advisory company founded in 2014.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | HARODharodassociates.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Harod Associates delivers global investigation and security solutions to complex crime and risk issues.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Venovoxvenovox.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 35 contacts → |
“At VENOVOX, we are a premier consultancy in risk management and background screening, delivering specialised services in due diligence, security advisory, background checks, and…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Team Fusion LTDteamfusion.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Our elite teams offer bespoke, integrated security solutions that adapt and react to the evolving threat landscape.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Othrysothrys.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 33 contacts → |
“Othrys is a global strategic and risk advisory firm founded in 2016.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 559 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Security consulting firms: dataset insights
September 14, 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
558 records in the displayed employee bands.
1 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 across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 559 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: September 14, 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 ↗
Security consulting firms by metro in the United Kingdom
Questions about this company list
What does Exact match mean for security consulting firms?
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 security consulting firms did RevenueBase find based in London, United Kingdom?
The saved snapshot records 559 matching company records, 5,491 tracked contacts and 1,441 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: September 14, 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
Security consulting firms by geography
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
- Security consulting firms based in Australia
- Security consulting firms based in the Netherlands
- Security consulting firms based in Mexico
- Security consulting firms based in Italy
- Security consulting firms based in Spain
- Security consulting firms based in South Africa
Cite this list
RevenueBase Data Team. Top 25 security consulting firms based in London, United Kingdom. Snapshot: September 14, 2026. https://revenuebase.ai/companies/security-consulting-firms/united-kingdom/london.
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
- Security consulting firms based in the United States
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany