Company lists · Data refreshed November 2026
Top 22 System security software companies based in the United Kingdom
RevenueBase identified 107 company matches for system security software companies associated with the United Kingdom as of November 2026 and tracks 6,723 professional contacts across them, including 3,423 with verified work emails. London is the largest hub.
This list covers company matches for system security software companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 22 largest system security software companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 5,283 contacts → | ||||
Exact match “Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 276 contacts → | ||||
Exact match “At Quorum Cyber, we're on a mission to help good people win.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 75 contacts → | ||||
Exact match “With a heritage of creating National Cyber Security Centre certified products, Becrypt, a Leonardo company, is a trusted provider of endpoint cybersecurity software solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 68 contacts → | ||||
Exact match “We help businesses and individuals stay protected in an increasingly complex digital world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 42 contacts → | ||||
Exact match “We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 32 contacts → | ||||
Exact match “Critical Endpoint Security | Unified Endpoint Management | Business Continuity Assessment Services | Resource Support and Consultancy | Powered by Tanium | Trend Micro Partner |…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 25 contacts → | ||||
Exact match “4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 15 contacts → | ||||
Exact match “A Software business that is producing a range of technology innovations including Cyber Security products designed to be simple and easy to use, all the way through to Cloud…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 13 contacts → | ||||
Exact match “Assuria provides trusted cyber security software solutions and managed security services that power Security Operations Centres, IT Protective Monitoring services and IT Assurance…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 9 contacts → | ||||
Exact match “PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 9 contacts → | ||||
Exact match “DefensityOne is a cybersecurity solutions provider specializing in proactive threat detection, risk management, and digital defense services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 8 contacts → | ||||
Exact match “Appurity is the modern endpoint and workplace security specialist, working with organisations where security, compliance, and productivity must work together without compromise.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 7 contacts → | ||||
Exact match “MYDIS is a UK-based security and software firm reimagining how physical and digital systems work together to protect, optimise, and empower high-risk environments.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 7 contacts → | ||||
Exact match “Formed in 2010, Security Software Solutions Ltd (S3 Ltd) has become a recognised force in Enterprise Security Solutions in Europe.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 6 contacts → | ||||
Exact match “Tactile Technology is a leading provider of comprehensive physical and cyber security services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 6 contacts → | ||||
Exact match “Rebasoft is a UK based Software and Services company, founded in 2009 and produces software solutions for the Cyber Security market space.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 5 contacts → | ||||
Exact match “TerraSecure Is a bespoke security provider offering price effective solution to small, Medium and large businesses.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 4 contacts → | ||||
Exact match “We are a leading cybersecurity company dedicated to protecting your digital assets and ensuring the utmost security for your organization.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 4 contacts → | ||||
Exact match “KIT365 is a cybersecurity company based in the city of Leicester.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 3 contacts → | ||||
Exact match “Cyber Tech Guardians is a leading cybersecurity company providing comprehensive, end-to-end digital protection for businesses and individuals.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 3 contacts → | ||||
Exact match “CheckSec is a UK based provider of security services and technologies, with a global focus.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “Founded in 2005 by Steven Hope and Phillip Nicklos, Winfrasoft is an independent software vendor building commercially supported infrastructure security and authentication tools…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “system security software companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 22 of 107 system security software companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 3,423 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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System security software companies based in the United Kingdom at a glance
As of Nov 5, 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 107 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 “system security software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 3,423 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
System security software companies by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “system security software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many system security software companies are there based in the United Kingdom?
RevenueBase identified 107 company matches for system security software companies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Sophos tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most system security software companies?
London leads with 30 company records, followed by Bristol (3) and Edinburgh (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,423 professional contacts with verified work emails tracked across these 107 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 107 system security software companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
System security software companies by geography
- System security software companies based in Sao Paulo, Brazil
- System security software companies based in London, United Kingdom
- System security software companies based in Australia
- System security software companies based in Brazil
- System security software companies based in Canada
- System security software companies based in France
- System security software companies based in Germany
- System security software companies based in India
- System security software companies based in Japan
- System security software companies based in Mexico
- System security software companies based in the Netherlands
- System security software companies based in Poland
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
- System security software companies based in Sao Paulo, Brazil
- System security software companies based in London, United Kingdom
- System security software companies based in Australia
- System security software companies based in Brazil
- System security software companies based in Canada
- System security software companies based in France
Company intelligence · public preview
Top 22 system security software 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 107 matching company records for system security software companies based in the United Kingdom, with 6,723 tracked contacts and 3,423 verified work emails.
This public preview shows 22 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 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 22 system security software 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 |  Sophossophos.comHQ: Abingdon, United KingdomReported employees: 5,001-10,000 | Abingdon, United Kingdom | 5,001-10,000 | Exact match | 5,283 contacts → |
“Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Quorum Cyberquorumcyber.comHQ: Edinburgh, United KingdomReported employees: 201-500 | Edinburgh, United Kingdom | 201-500 | Exact match | 276 contacts → |
“At Quorum Cyber, we're on a mission to help good people win.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Becryptbecrypt.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 75 contacts → |
“With a heritage of creating National Cyber Security Centre certified products, Becrypt, a Leonardo company, is a trusted provider of endpoint cybersecurity software solutions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Eset UKeset.comHQ: Bournemouth, United KingdomReported employees: 51-200 | Bournemouth, United Kingdom | 51-200 | Exact match | 68 contacts → |
“We help businesses and individuals stay protected in an increasingly complex digital world.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Threatscapethreatscape.comHQ: Dublin, United KingdomReported employees: 11-50 | Dublin, United Kingdom | 11-50 | Exact match | 42 contacts → |
“We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Pointwirepointwire.comHQ: Royston, United KingdomReported employees: 11-50 | Royston, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Critical Endpoint Security | Unified Endpoint Management | Business Continuity Assessment Services | Resource Support and Consultancy | Powered by Tanium | Trend Micro Partner |…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  4secure LTD4-secure.comHQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 25 contacts → |
“4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Roboshadowroboshadow.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“A Software business that is producing a range of technology innovations including Cyber Security products designed to be simple and easy to use, all the way through to Cloud…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Assuria LTDassuria.comHQ: Reading, United KingdomReported employees: 11-50 | Reading, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Assuria provides trusted cyber security software solutions and managed security services that power Security Operations Centres, IT Protective Monitoring services and IT Assurance…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  PC Power International LTDpcpowerltd.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Defensityonedefensityone.comHQ: Milton Keynes, United KingdomReported employees: 11-50 | Milton Keynes, United Kingdom | 11-50 | Exact match | 9 contacts → |
“DefensityOne is a cybersecurity solutions provider specializing in proactive threat detection, risk management, and digital defense services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Appurity Limitedappurity.co.ukHQ: Farnham, United KingdomReported employees: 11-50 | Farnham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“Appurity is the modern endpoint and workplace security specialist, working with organisations where security, compliance, and productivity must work together without compromise.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  MYDISmydis.comHQ: Redditch, United KingdomReported employees: 11-50 | Redditch, United Kingdom | 11-50 | Exact match | 7 contacts → |
“MYDIS is a UK-based security and software firm reimagining how physical and digital systems work together to protect, optimise, and empower high-risk environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Security Software Solutions LTDs3-uk.com HQ: Marlow Bucks, United KingdomReported employees: 1-10 | Marlow Bucks, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Formed in 2010, Security Software Solutions Ltd (S3 Ltd) has become a recognised force in Enterprise Security Solutions in Europe.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Tactile Technologytactiletechnology.comHQ: Birmingham, United KingdomReported employees: 1-10 | Birmingham, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Tactile Technology is a leading provider of comprehensive physical and cyber security services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Rebasoft Limitedrebasoft.netHQ: Reading, United KingdomReported employees: 11-50 | Reading, United Kingdom | 11-50 | Exact match | 6 contacts → |
“Rebasoft is a UK based Software and Services company, founded in 2009 and produces software solutions for the Cyber Security market space.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Terra Secureterrasecure.ukHQ: Brigg, United KingdomReported employees: 11-50 | Brigg, United Kingdom | 11-50 | Exact match | 5 contacts → |
“TerraSecure Is a bespoke security provider offering price effective solution to small, Medium and large businesses.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Cyberniticscybernitics.comHQ: Glasgow, United KingdomReported employees: 1-10 | Glasgow, United Kingdom | 1-10 | Exact match | 4 contacts → |
“We are a leading cybersecurity company dedicated to protecting your digital assets and ensuring the utmost security for your organization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Kit365kit365.co.ukHQ: Leicester, United KingdomReported employees: 1-10 | Leicester, United Kingdom | 1-10 | Exact match | 4 contacts → |
“KIT365 is a cybersecurity company based in the city of Leicester.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Cyber Tech Guardianscybertechguardians.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Cyber Tech Guardians is a leading cybersecurity company providing comprehensive, end-to-end digital protection for businesses and individuals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Checksecchecksec.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“CheckSec is a UK based provider of security services and technologies, with a global focus.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Winfrasoftwinfrasoft.comHQ: Bracknell, United KingdomReported employees: 1-10 | Bracknell, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Founded in 2005 by Steven Hope and Phillip Nicklos, Winfrasoft is an independent software vendor building commercially supported infrastructure security and authentication tools…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 107 company matches
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System security software companies: dataset insights
November 5, 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
105 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 107 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: November 5, 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 ↗
System security software companies by metro
Questions about this company list
What does Exact match mean for system security software 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 system security software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 107 matching company records, 6,723 tracked contacts and 3,423 verified emails. The public preview displays 22 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: November 5, 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
System security software companies by geography
- System security software companies based in Sao Paulo, Brazil
- System security software companies based in London, United Kingdom
- System security software companies based in Australia
- System security software companies based in Brazil
- System security software companies based in Canada
- System security software companies based in France
- System security software companies based in Germany
- System security software companies based in India
- System security software companies based in Japan
- System security software companies based in Mexico
- System security software companies based in the Netherlands
- System security software companies based in Poland
Cite this list
RevenueBase Data Team. Top 22 system security software companies based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/system-security-software-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
- System security software companies based in Sao Paulo, Brazil
- System security software companies based in London, United Kingdom
- System security software companies based in Australia
- System security software companies based in Brazil
- System security software companies based in Canada
- System security software companies based in France
Company intelligence · public preview
Top 22 system security software companies based in the United Kingdom
RevenueBase records 107 matching company records for system security software companies based in the United Kingdom, with 6,723 tracked contacts and 3,423 verified work emails.
This public preview shows 22 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 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 22 system security software 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 | Sophossophos.com HQ: Abingdon, United KingdomReported employees: 5,001-10,000 | Abingdon, United Kingdom | 5,001-10,000 | Exact match | 5,283 contacts → |
“Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Quorum Cyberquorumcyber.com HQ: Edinburgh, United KingdomReported employees: 201-500 | Edinburgh, United Kingdom | 201-500 | Exact match | 276 contacts → |
“At Quorum Cyber, we're on a mission to help good people win.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Becryptbecrypt.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 75 contacts → |
“With a heritage of creating National Cyber Security Centre certified products, Becrypt, a Leonardo company, is a trusted provider of endpoint cybersecurity software solutions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Eset UKeset.com HQ: Bournemouth, United KingdomReported employees: 51-200 | Bournemouth, United Kingdom | 51-200 | Exact match | 68 contacts → |
“We help businesses and individuals stay protected in an increasingly complex digital world.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Threatscapethreatscape.com HQ: Dublin, United KingdomReported employees: 11-50 | Dublin, United Kingdom | 11-50 | Exact match | 42 contacts → |
“We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Pointwirepointwire.com HQ: Royston, United KingdomReported employees: 11-50 | Royston, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Critical Endpoint Security | Unified Endpoint Management | Business Continuity Assessment Services | Resource Support and Consultancy | Powered by Tanium | Trend Micro Partner |…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 4secure LTD4-secure.com HQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 25 contacts → |
“4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Roboshadowroboshadow.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“A Software business that is producing a range of technology innovations including Cyber Security products designed to be simple and easy to use, all the way through to Cloud…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Assuria LTDassuria.com HQ: Reading, United KingdomReported employees: 11-50 | Reading, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Assuria provides trusted cyber security software solutions and managed security services that power Security Operations Centres, IT Protective Monitoring services and IT Assurance…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | PC Power International LTDpcpowerltd.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Defensityonedefensityone.com HQ: Milton Keynes, United KingdomReported employees: 11-50 | Milton Keynes, United Kingdom | 11-50 | Exact match | 9 contacts → |
“DefensityOne is a cybersecurity solutions provider specializing in proactive threat detection, risk management, and digital defense services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Appurity Limitedappurity.co.uk HQ: Farnham, United KingdomReported employees: 11-50 | Farnham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“Appurity is the modern endpoint and workplace security specialist, working with organisations where security, compliance, and productivity must work together without compromise.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | MYDISmydis.com HQ: Redditch, United KingdomReported employees: 11-50 | Redditch, United Kingdom | 11-50 | Exact match | 7 contacts → |
“MYDIS is a UK-based security and software firm reimagining how physical and digital systems work together to protect, optimise, and empower high-risk environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Security Software Solutions LTDs3-uk.com HQ: Marlow Bucks, United KingdomReported employees: 1-10 | Marlow Bucks, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Formed in 2010, Security Software Solutions Ltd (S3 Ltd) has become a recognised force in Enterprise Security Solutions in Europe.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Tactile Technologytactiletechnology.com HQ: Birmingham, United KingdomReported employees: 1-10 | Birmingham, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Tactile Technology is a leading provider of comprehensive physical and cyber security services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Rebasoft Limitedrebasoft.net HQ: Reading, United KingdomReported employees: 11-50 | Reading, United Kingdom | 11-50 | Exact match | 6 contacts → |
“Rebasoft is a UK based Software and Services company, founded in 2009 and produces software solutions for the Cyber Security market space.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Terra Secureterrasecure.uk HQ: Brigg, United KingdomReported employees: 11-50 | Brigg, United Kingdom | 11-50 | Exact match | 5 contacts → |
“TerraSecure Is a bespoke security provider offering price effective solution to small, Medium and large businesses.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cyberniticscybernitics.com HQ: Glasgow, United KingdomReported employees: 1-10 | Glasgow, United Kingdom | 1-10 | Exact match | 4 contacts → |
“We are a leading cybersecurity company dedicated to protecting your digital assets and ensuring the utmost security for your organization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Kit365kit365.co.uk HQ: Leicester, United KingdomReported employees: 1-10 | Leicester, United Kingdom | 1-10 | Exact match | 4 contacts → |
“KIT365 is a cybersecurity company based in the city of Leicester.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Cyber Tech Guardianscybertechguardians.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Cyber Tech Guardians is a leading cybersecurity company providing comprehensive, end-to-end digital protection for businesses and individuals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Checksecchecksec.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“CheckSec is a UK based provider of security services and technologies, with a global focus.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Winfrasoftwinfrasoft.com HQ: Bracknell, United KingdomReported employees: 1-10 | Bracknell, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Founded in 2005 by Steven Hope and Phillip Nicklos, Winfrasoft is an independent software vendor building commercially supported infrastructure security and authentication tools…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 107 company matches
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System security software companies: dataset insights
November 5, 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
105 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 107 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: November 5, 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 ↗
System security software companies by metro
Questions about this company list
What does Exact match mean for system security software 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 system security software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 107 matching company records, 6,723 tracked contacts and 3,423 verified emails. The public preview displays 22 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: November 5, 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
System security software companies by geography
- System security software companies based in Sao Paulo, Brazil
- System security software companies based in London, United Kingdom
- System security software companies based in Australia
- System security software companies based in Brazil
- System security software companies based in Canada
- System security software companies based in France
- System security software companies based in Germany
- System security software companies based in India
- System security software companies based in Japan
- System security software companies based in Mexico
- System security software companies based in the Netherlands
- System security software companies based in Poland
Cite this list
RevenueBase Data Team. Top 22 system security software companies based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/system-security-software-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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