Company lists · Data refreshed September 2026
Top 25 AI security assessment companies based in the United Kingdom
RevenueBase identified 82 company matches for AI security assessment companies associated with the United Kingdom as of September 2026 and tracks 538 professional contacts across them, including 194 with verified work emails. London is the largest hub.
This list covers company matches for AI security assessment companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 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 AI security assessment companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 73 contacts → | ||||
Exact match “Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 36 contacts → | ||||
Exact match “RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 26 contacts → | ||||
Exact match “Prism Infosec is a CREST-approved member and Payment Card Industry Qualified Security Assessor Company based in Cheltenham and Liverpool, UK and was founded in 2006.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 26 contacts → | ||||
Exact match “We don’t make AI, we break it.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 24 contacts → | ||||
Exact match “i3Secure is a cyber security and information assurance consultancy protecting the confidentiality, integrity and availability of data across defence, public and private sectors.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 19 contacts → | ||||
Exact match “Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 18 contacts → | ||||
Exact match “Critec Group is an independent security risk consultancy, specialising in comprehensive security risk, threat, and vulnerability analysis, as well as security mitigation design…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 15 contacts → | ||||
Exact match “is an ISO 9001:2015 and ISO/IEC 27001:2022 certified, DPIIT-recognized cybersecurity company delivering structured External Vulnerability Assessment & Penetration Testing (VAPT)…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 14 contacts → | ||||
Exact match “Demand more from your AI & Data Security partner.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 12 contacts → | ||||
Exact match “Cyber Guarded is a vendor independent business which provides Cyber Security auditing and testing services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 12 contacts → | ||||
Exact match “Security Consultants at Infosec Partners are formally trained to a high degree, having at least one of the following Security Management certifications: CESG CLAS, CISSP, CISM…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 11 contacts → | ||||
Exact match “1 Cyber Valley is a PCI DSS–approved Qualified Security Assessor (QSA) and PCI PIN Assessor (QPA), delivering compliance and assurance services to clients in more than 120…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 8 contacts → | ||||
Exact match “Covenda is AI cybersecurity with cutting-edge threat modeling and ML-powered risk prediction to counter cyber attacks on businesses.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 7 contacts → | ||||
Exact match “We operationalize AI governance across the entire AI lifecycle by providing proactive AI Red Teaming to expose critical vulnerabilities, rigorous Model Evaluation to ensure output…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 6 contacts → | ||||
Exact match “AI Assurance for Autonomous Systems” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 6 contacts → | ||||
Exact match “NGS Secure is now NCC Group NCC Group is a leading global information assurance firm, providing freedom from doubt that all critical material is available, protected, and…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 5 contacts → | ||||
Exact match “Cyber Alchemy protects the value in your business, ensuring resilience against evolving cyber threats.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 5 contacts → | ||||
Exact match “Every engagement led by consultants with 10-20 years of offensive security experience.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 4 contacts → | ||||
Exact match “Our unbridled passion for Inspiring Cyber Wellbeing is at our core.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 4 contacts → | ||||
Exact match “We specialise in helping organisations identify security concerns and quantify the risks you may have across your assets, using Penetration Testing, Threat Simulation and…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 3 contacts → | ||||
Exact match “As a certified accreditation body for Cyber Essentials and IASME Cyber Assurance, Unity Metrix is at the frontline of the fight against cyber threats, delivering robust security…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “Cyber Sense is a UK-based cyber assurance company helping businesses stay secure, compliant, and audit-ready.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 3 contacts → | ||||
Exact match “Sentrium is a bespoke cyber security consultancy, powered by extensive business and technical expertise that provides you with the assessment and advisory services you need to…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 3 contacts → | ||||
Exact match “We are an independent security testing consultancy providing expertise in technical information assurance through security testing and incident response.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “Gain a competitive edge with our secure AI solutions that address key security concerns.” Recorded in the RevenueBase company graph · Sep 27, 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 “AI security assessment companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 82 AI security assessment companies based in the United Kingdom
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AI security assessment companies based in the United Kingdom at a glance
As of Sep 27, 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 82 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 “AI security assessment companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 194 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 27, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “AI security assessment companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many AI security assessment companies are there based in the United Kingdom?
RevenueBase identified 82 company matches for AI security assessment companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Dionach By Nomios tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most AI security assessment companies?
London leads with 41 company records, followed by Leeds (3) and Belfast (2).
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 194 professional contacts with verified work emails tracked across these 82 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 27, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
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- Lists by location
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- New lists
- AI security assessment companies based in Australia
- AI security assessment companies based in Canada
- AI security assessment companies based in Germany
- AI security assessment companies based in India
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- AI companies based in the United Kingdom
Company intelligence · public preview
Top 25 AI security assessment companies 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 82 matching company records for AI security assessment companies based in the United Kingdom, with 538 tracked contacts and 194 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 27, 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 AI security assessment companies 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 |  Dionach By Nomiosdionach.comHQ: Oxford, United KingdomReported employees: 51-200 | Oxford, United Kingdom | 51-200 | Exact match | 73 contacts → |
“Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Redhunt Labsredhuntlabs.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 36 contacts → |
“RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Prism Infosecprisminfosec.com HQ: Cheltenham, United KingdomReported employees: 11-50 | Cheltenham, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Prism Infosec is a CREST-approved member and Payment Card Industry Qualified Security Assessor Company based in Cheltenham and Liverpool, UK and was founded in 2006.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  ADVAIadvai.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“We don’t make AI, we break it.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  I3secure LTDi3secure.co.ukHQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 24 contacts → |
“i3Secure is a cyber security and information assurance consultancy protecting the confidentiality, integrity and availability of data across defence, public and private sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Halo I.Shalo-is.co.ukHQ: Leeds, United KingdomReported employees: 11-50 | Leeds, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Critec Group Limitedcritecgroup.com HQ: Wrea Green, United KingdomReported employees: 11-50 | Wrea Green, United Kingdom | 11-50 | Exact match | 18 contacts → |
“Critec Group is an independent security risk consultancy, specialising in comprehensive security risk, threat, and vulnerability analysis, as well as security mitigation design…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Eh1-Infotech Cybersecurityeh1infotech.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“is an ISO 9001:2015 and ISO/IEC 27001:2022 certified, DPIIT-recognized cybersecurity company delivering structured External Vulnerability Assessment & Penetration Testing (VAPT)…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Everycloud AI & Data Securityeverycloud.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Demand more from your AI & Data Security partner.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Cyber Guarded LTDcyberguarded.comHQ: Belfast, United KingdomReported employees: 11-50 | Belfast, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Cyber Guarded is a vendor independent business which provides Cyber Security auditing and testing services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Infosec Partnersinfosecpartners.comHQ: Winchester, United KingdomReported employees: 11-50 | Winchester, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Security Consultants at Infosec Partners are formally trained to a high degree, having at least one of the following Security Management certifications: CESG CLAS, CISSP, CISM…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  1 Cyber Valleyonecybervalley.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“1 Cyber Valley is a PCI DSS–approved Qualified Security Assessor (QSA) and PCI PIN Assessor (QPA), delivering compliance and assurance services to clients in more than 120…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Covenda Labscovenda.aiHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Covenda is AI cybersecurity with cutting-edge threat modeling and ML-powered risk prediction to counter cyber attacks on businesses.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Sahel AIsahelai.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“We operationalize AI governance across the entire AI lifecycle by providing proactive AI Red Teaming to expose critical vulnerabilities, rigorous Model Evaluation to ensure output…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Cybpasscybpass.comHQ: Sheffield, United KingdomReported employees: 1-10 | Sheffield, United Kingdom | 1-10 | Exact match | 6 contacts → |
“AI Assurance for Autonomous Systems” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  NGS Securenccgroup.comHQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 6 contacts → |
“NGS Secure is now NCC Group NCC Group is a leading global information assurance firm, providing freedom from doubt that all critical material is available, protected, and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cyber Alchemy LTDcyberalchemy.co.uk HQ: Rotherham, United KingdomReported employees: 1-10 | Rotherham, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Cyber Alchemy protects the value in your business, ensuring resilience against evolving cyber threats.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Fortbridgefortbridge.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Every engagement led by consultants with 10-20 years of offensive security experience.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Cyberfitcyberfit.solutionsHQ: Leeds, United KingdomReported employees: 1-10 | Leeds, United Kingdom | 1-10 | Exact match | 4 contacts → |
“Our unbridled passion for Inspiring Cyber Wellbeing is at our core.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Laneden LTDlaneden.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“We specialise in helping organisations identify security concerns and quantify the risks you may have across your assets, using Penetration Testing, Threat Simulation and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Unity Metrixunitymetrix.com HQ: Market Deeping, United KingdomReported employees: 1-10 | Market Deeping, United Kingdom | 1-10 | Exact match | 3 contacts → |
“As a certified accreditation body for Cyber Essentials and IASME Cyber Assurance, Unity Metrix is at the frontline of the fight against cyber threats, delivering robust security…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Cyber Sensecybersenseuk.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Cyber Sense is a UK-based cyber assurance company helping businesses stay secure, compliant, and audit-ready.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Sentrium Security LTDsentrium.co.uk HQ: Cheltenham, United KingdomReported employees: 1-10 | Cheltenham, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Sentrium is a bespoke cyber security consultancy, powered by extensive business and technical expertise that provides you with the assessment and advisory services you need to…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | 7 Elements LTD7elements.co.uk HQ: Linlithgow, United KingdomReported employees: 1-10 | Linlithgow, United Kingdom | 1-10 | Exact match | 3 contacts → |
“We are an independent security testing consultancy providing expertise in technical information assurance through security testing and incident response.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Syntelicsyntelic.aiHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Gain a competitive edge with our secure AI solutions that address key security concerns.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 82 company matches
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AI security assessment companies: dataset insights
September 27, 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
82 records in the displayed employee bands.
0 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 82 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 27, 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 ↗
Questions about this company list
What does Exact match mean for AI security assessment companies?
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 AI security assessment companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 82 matching company records, 538 tracked contacts and 194 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 27, 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
AI security assessment companies by geography
Cite this list
RevenueBase Data Team. Top 25 AI security assessment companies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/ai-security-assessment-companies/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
- AI security assessment companies based in Australia
- AI security assessment companies based in Canada
- AI security assessment companies based in Germany
- AI security assessment companies based in India
- AI security assessment companies based in the United States
- AI companies based in the United Kingdom
Company intelligence · public preview
Top 25 AI security assessment companies based in the United Kingdom
RevenueBase records 82 matching company records for AI security assessment companies based in the United Kingdom, with 538 tracked contacts and 194 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 27, 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 AI security assessment companies 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 | Dionach By Nomiosdionach.com HQ: Oxford, United KingdomReported employees: 51-200 | Oxford, United Kingdom | 51-200 | Exact match | 73 contacts → |
“Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Redhunt Labsredhuntlabs.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 36 contacts → |
“RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Prism Infosecprisminfosec.com HQ: Cheltenham, United KingdomReported employees: 11-50 | Cheltenham, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Prism Infosec is a CREST-approved member and Payment Card Industry Qualified Security Assessor Company based in Cheltenham and Liverpool, UK and was founded in 2006.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | ADVAIadvai.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“We don’t make AI, we break it.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | I3secure LTDi3secure.co.uk HQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 24 contacts → |
“i3Secure is a cyber security and information assurance consultancy protecting the confidentiality, integrity and availability of data across defence, public and private sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Halo I.Shalo-is.co.uk HQ: Leeds, United KingdomReported employees: 11-50 | Leeds, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Critec Group Limitedcritecgroup.com HQ: Wrea Green, United KingdomReported employees: 11-50 | Wrea Green, United Kingdom | 11-50 | Exact match | 18 contacts → |
“Critec Group is an independent security risk consultancy, specialising in comprehensive security risk, threat, and vulnerability analysis, as well as security mitigation design…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Eh1-Infotech Cybersecurityeh1infotech.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“is an ISO 9001:2015 and ISO/IEC 27001:2022 certified, DPIIT-recognized cybersecurity company delivering structured External Vulnerability Assessment & Penetration Testing (VAPT)…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Everycloud AI & Data Securityeverycloud.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Demand more from your AI & Data Security partner.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Cyber Guarded LTDcyberguarded.com HQ: Belfast, United KingdomReported employees: 11-50 | Belfast, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Cyber Guarded is a vendor independent business which provides Cyber Security auditing and testing services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Infosec Partnersinfosecpartners.com HQ: Winchester, United KingdomReported employees: 11-50 | Winchester, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Security Consultants at Infosec Partners are formally trained to a high degree, having at least one of the following Security Management certifications: CESG CLAS, CISSP, CISM…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | 1 Cyber Valleyonecybervalley.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“1 Cyber Valley is a PCI DSS–approved Qualified Security Assessor (QSA) and PCI PIN Assessor (QPA), delivering compliance and assurance services to clients in more than 120…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Covenda Labscovenda.ai HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 8 contacts → |
“Covenda is AI cybersecurity with cutting-edge threat modeling and ML-powered risk prediction to counter cyber attacks on businesses.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Sahel AIsahelai.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“We operationalize AI governance across the entire AI lifecycle by providing proactive AI Red Teaming to expose critical vulnerabilities, rigorous Model Evaluation to ensure output…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Cybpasscybpass.com HQ: Sheffield, United KingdomReported employees: 1-10 | Sheffield, United Kingdom | 1-10 | Exact match | 6 contacts → |
“AI Assurance for Autonomous Systems” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | NGS Securenccgroup.com HQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 6 contacts → |
“NGS Secure is now NCC Group NCC Group is a leading global information assurance firm, providing freedom from doubt that all critical material is available, protected, and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cyber Alchemy LTDcyberalchemy.co.uk HQ: Rotherham, United KingdomReported employees: 1-10 | Rotherham, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Cyber Alchemy protects the value in your business, ensuring resilience against evolving cyber threats.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Fortbridgefortbridge.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Every engagement led by consultants with 10-20 years of offensive security experience.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Cyberfitcyberfit.solutions HQ: Leeds, United KingdomReported employees: 1-10 | Leeds, United Kingdom | 1-10 | Exact match | 4 contacts → |
“Our unbridled passion for Inspiring Cyber Wellbeing is at our core.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Laneden LTDlaneden.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“We specialise in helping organisations identify security concerns and quantify the risks you may have across your assets, using Penetration Testing, Threat Simulation and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Unity Metrixunitymetrix.com HQ: Market Deeping, United KingdomReported employees: 1-10 | Market Deeping, United Kingdom | 1-10 | Exact match | 3 contacts → |
“As a certified accreditation body for Cyber Essentials and IASME Cyber Assurance, Unity Metrix is at the frontline of the fight against cyber threats, delivering robust security…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Cyber Sensecybersenseuk.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Cyber Sense is a UK-based cyber assurance company helping businesses stay secure, compliant, and audit-ready.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Sentrium Security LTDsentrium.co.uk HQ: Cheltenham, United KingdomReported employees: 1-10 | Cheltenham, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Sentrium is a bespoke cyber security consultancy, powered by extensive business and technical expertise that provides you with the assessment and advisory services you need to…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | 7 Elements LTD7elements.co.uk HQ: Linlithgow, United KingdomReported employees: 1-10 | Linlithgow, United Kingdom | 1-10 | Exact match | 3 contacts → |
“We are an independent security testing consultancy providing expertise in technical information assurance through security testing and incident response.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Syntelicsyntelic.ai HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Gain a competitive edge with our secure AI solutions that address key security concerns.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 82 company matches
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AI security assessment companies: dataset insights
September 27, 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
82 records in the displayed employee bands.
0 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 82 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 27, 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 ↗
Questions about this company list
What does Exact match mean for AI security assessment companies?
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 AI security assessment companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 82 matching company records, 538 tracked contacts and 194 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 27, 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
AI security assessment companies by geography
Cite this list
RevenueBase Data Team. Top 25 AI security assessment companies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/ai-security-assessment-companies/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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