Company lists · Data refreshed September 2026
Top 18 Managed siem service providers based in the United Kingdom
RevenueBase identified 40 company matches for managed siem service providers associated with the United Kingdom as of September 2026 and tracks 440 professional contacts across them, including 155 with verified work emails. London is the largest hub.
This list covers company matches for managed siem service providers 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 20, 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 18 largest managed siem service providers based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 95 contacts → | ||||
Exact match “SEP2 is an award-winning UK-based cyber security specialist service provider, powered by a dedicated team of experts available 24/7/365.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 2 | 79 contacts → | ||||
Exact match “Cybanetix is a leading provider of managed Cyber Security Service and hosted SIEM and breach detection services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 3 | 54 contacts → | ||||
Exact match “SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 4 | 45 contacts → | ||||
Exact match “Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 5 | 22 contacts → | ||||
Exact match “Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 6 | 17 contacts → | ||||
Exact match “We help organisations turn security, operations and log data into actionable intelligence - so monitoring platforms deliver real outcomes, not just dashboards.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 7 | 9 contacts → | ||||
Exact match “Air Sec is the specialist cyber security division of award winning Managed Service Provider, Air IT.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 8 | 7 contacts → | ||||
Exact match “ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 10 | 5 contacts → | ||||
Exact match “Brightridge provides clear, secure and supported technology for your business.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 11 | 5 contacts → | ||||
Exact match “Key Capabilities • 24/7 SIEM (Security Information and Event Management) • Virtual Helpdesk • SOC (Security Operations Center) • Robust Penetration Testing • Threat Intelligence…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 12 | 4 contacts → | ||||
Exact match “As a security first managed service provider we are focused on keeping our client’s business’ safe and secure from cyber-attacks, allowing them to concentrate on growing their…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 13 | 2 contacts → | ||||
Exact match “Managed Security Service Provider (MSSP) and ConnectWise Partner Services include: • IT Service Desk Management - NOC & SOC - Service Desk Analysts • Cloud Security • Cloud Backup…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 14 | 2 contacts → | ||||
Exact match “OwlGaze is the cybersecurity software company behind Blacklight AI SIEM.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 15 | 2 contacts → | ||||
Exact match “For our latest updates, please visit our company page 'KT Secure'.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 16 | 2 contacts → | ||||
Exact match “Managed Security Service Provider (MSSP) to SME’s offering the most up to date technology providing multi-layered protection against the latest threats to their business.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 17 | 1 contacts → | ||||
Exact match “Cyber-Analytica helps organizations protect their digital assets through managed cyber security services, compliance support, and risk-based security strategy, without…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 18 | 1 contacts → | ||||
Exact match “Welcome to RGL Tech: Your Shield in the Digital Realm!” Recorded in the RevenueBase company graph · Sep 20, 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 “managed siem service providers”. 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 18 of 40 managed siem service providers based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 155 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Managed siem service providers based in the United Kingdom at a glance
As of Sep 20, 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 40 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 “managed siem service providers” 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 155 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 20, 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 “managed siem service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many managed siem service providers are there based in the United Kingdom?
RevenueBase identified 40 company matches for managed siem service providers 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?
Sep2 tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most managed siem service providers?
London leads with 15 company records, followed by Ashford (1) and Ashton Under Lyne (1).
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 155 professional contacts with verified work emails tracked across these 40 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 20, 2026.
Ready to reach these companies? Verified emails and direct dials for all 40 managed siem service providers based in the United Kingdom. Start with a free account, no credit card.
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Managed siem service providers by geography
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.
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Company intelligence · public preview
Top 18 managed siem service providers 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 40 matching company records for managed siem service providers based in the United Kingdom, with 440 tracked contacts and 155 verified work emails.
This public preview shows 18 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 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 18 managed siem service providers 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 |  Sep2sep2.securityHQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 95 contacts → |
“SEP2 is an award-winning UK-based cyber security specialist service provider, powered by a dedicated team of experts available 24/7/365.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Cybanetixcybanetix.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 79 contacts → |
“Cybanetix is a leading provider of managed Cyber Security Service and hosted SIEM and breach detection services.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Senseonsenseon.ioHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 54 contacts → |
“SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Satisnet, A Gamma Companysatisnet.co.ukHQ: Luton, United KingdomReported employees: 51-200 | Luton, United Kingdom | 51-200 | Exact match | 45 contacts → |
“Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Blue Cube Security LTDbluecubesecurity.comHQ: East Grinstead, United KingdomReported employees: 11-50 | East Grinstead, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Apto Solutionsaptosolutions.co.ukHQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 17 contacts → |
“We help organisations turn security, operations and log data into actionable intelligence - so monitoring platforms deliver real outcomes, not just dashboards.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  AIR SECair-it.co.ukHQ: Sandiacre, United KingdomReported employees: 1-10 | Sandiacre, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Air Sec is the specialist cyber security division of award winning Managed Service Provider, Air IT.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  ISUMOisumo.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 7 contacts → |
“ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Threat Protectthreatprotect.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Brightridgebrightridge.co.uk HQ: Livingston, United KingdomReported employees: 11-50 | Livingston, United Kingdom | 11-50 | Exact match | 5 contacts → |
“Brightridge provides clear, secure and supported technology for your business.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Gcssystems Limitedgcssystems.co.ukHQ: Richmond, United KingdomReported employees: 51-200 | Richmond, United Kingdom | 51-200 | Exact match | 5 contacts → |
“Key Capabilities • 24/7 SIEM (Security Information and Event Management) • Virtual Helpdesk • SOC (Security Operations Center) • Robust Penetration Testing • Threat Intelligence…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Timeless IMStimelessims.co.uk HQ: Ashford, United KingdomReported employees: 11-50 | Ashford, United Kingdom | 11-50 | Exact match | 4 contacts → |
“As a security first managed service provider we are focused on keeping our client’s business’ safe and secure from cyber-attacks, allowing them to concentrate on growing their…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Affinity Guardaffinityguard.co.ukHQ: Malton, United KingdomReported employees: 1-10 | Malton, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Managed Security Service Provider (MSSP) and ConnectWise Partner Services include: • IT Service Desk Management - NOC & SOC - Service Desk Analysts • Cloud Security • Cloud Backup…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Blacklight AI Owlgazeblacklightai.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 2 contacts → |
“OwlGaze is the cybersecurity software company behind Blacklight AI SIEM.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Knight Trading UKknighttradinguk.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 2 contacts → |
“For our latest updates, please visit our company page 'KT Secure'.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Actisoft Technology Limitedactisofttechnology.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Managed Security Service Provider (MSSP) to SME’s offering the most up to date technology providing multi-layered protection against the latest threats to their business.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cyber Analyticacyber-analytica.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 1 contacts → |
“Cyber-Analytica helps organizations protect their digital assets through managed cyber security services, compliance support, and risk-based security strategy, without…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  RGL Tech Cyber Securityrgl-tech.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Welcome to RGL Tech: Your Shield in the Digital Realm!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 18 of 40 company matches
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Managed siem service providers: dataset insights
September 20, 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
39 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured 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 40 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 20, 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 managed siem service providers?
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 managed siem service providers did RevenueBase find based in the United Kingdom?
The saved snapshot records 40 matching company records, 440 tracked contacts and 155 verified emails. The public preview displays 18 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 20, 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
Managed siem service providers by geography
Cite this list
RevenueBase Data Team. Top 18 managed siem service providers based in the United Kingdom. Snapshot: September 20, 2026. https://revenuebase.ai/companies/managed-siem-service-providers/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
- Managed siem service providers based in Canada
- Managed siem service providers based in India
- Managed siem service providers based in the United States
- AI companies based in the United Kingdom
- Cybersecurity companies based in the United Kingdom
- Manufacturing companies based in the United Kingdom
Company intelligence · public preview
Top 18 managed siem service providers based in the United Kingdom
RevenueBase records 40 matching company records for managed siem service providers based in the United Kingdom, with 440 tracked contacts and 155 verified work emails.
This public preview shows 18 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 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 18 managed siem service providers 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 | Sep2sep2.security HQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 95 contacts → |
“SEP2 is an award-winning UK-based cyber security specialist service provider, powered by a dedicated team of experts available 24/7/365.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Cybanetixcybanetix.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 79 contacts → |
“Cybanetix is a leading provider of managed Cyber Security Service and hosted SIEM and breach detection services.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Senseonsenseon.io HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 54 contacts → |
“SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Satisnet, A Gamma Companysatisnet.co.uk HQ: Luton, United KingdomReported employees: 51-200 | Luton, United Kingdom | 51-200 | Exact match | 45 contacts → |
“Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Blue Cube Security LTDbluecubesecurity.com HQ: East Grinstead, United KingdomReported employees: 11-50 | East Grinstead, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Apto Solutionsaptosolutions.co.uk HQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 17 contacts → |
“We help organisations turn security, operations and log data into actionable intelligence - so monitoring platforms deliver real outcomes, not just dashboards.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | AIR SECair-it.co.uk HQ: Sandiacre, United KingdomReported employees: 1-10 | Sandiacre, United Kingdom | 1-10 | Exact match | 9 contacts → |
“Air Sec is the specialist cyber security division of award winning Managed Service Provider, Air IT.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | ISUMOisumo.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 7 contacts → |
“ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Threat Protectthreatprotect.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Brightridgebrightridge.co.uk HQ: Livingston, United KingdomReported employees: 11-50 | Livingston, United Kingdom | 11-50 | Exact match | 5 contacts → |
“Brightridge provides clear, secure and supported technology for your business.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Gcssystems Limitedgcssystems.co.uk HQ: Richmond, United KingdomReported employees: 51-200 | Richmond, United Kingdom | 51-200 | Exact match | 5 contacts → |
“Key Capabilities • 24/7 SIEM (Security Information and Event Management) • Virtual Helpdesk • SOC (Security Operations Center) • Robust Penetration Testing • Threat Intelligence…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Timeless IMStimelessims.co.uk HQ: Ashford, United KingdomReported employees: 11-50 | Ashford, United Kingdom | 11-50 | Exact match | 4 contacts → |
“As a security first managed service provider we are focused on keeping our client’s business’ safe and secure from cyber-attacks, allowing them to concentrate on growing their…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Affinity Guardaffinityguard.co.uk HQ: Malton, United KingdomReported employees: 1-10 | Malton, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Managed Security Service Provider (MSSP) and ConnectWise Partner Services include: • IT Service Desk Management - NOC & SOC - Service Desk Analysts • Cloud Security • Cloud Backup…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Blacklight AI Owlgazeblacklightai.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 2 contacts → |
“OwlGaze is the cybersecurity software company behind Blacklight AI SIEM.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Knight Trading UKknighttradinguk.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 2 contacts → |
“For our latest updates, please visit our company page 'KT Secure'.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Actisoft Technology Limitedactisofttechnology.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Managed Security Service Provider (MSSP) to SME’s offering the most up to date technology providing multi-layered protection against the latest threats to their business.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cyber Analyticacyber-analytica.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 1 contacts → |
“Cyber-Analytica helps organizations protect their digital assets through managed cyber security services, compliance support, and risk-based security strategy, without…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | RGL Tech Cyber Securityrgl-tech.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Welcome to RGL Tech: Your Shield in the Digital Realm!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Managed siem service providers: dataset insights
September 20, 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
39 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured 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 40 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 20, 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 managed siem service providers?
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 managed siem service providers did RevenueBase find based in the United Kingdom?
The saved snapshot records 40 matching company records, 440 tracked contacts and 155 verified emails. The public preview displays 18 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 20, 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
Managed siem service providers by geography
Cite this list
RevenueBase Data Team. Top 18 managed siem service providers based in the United Kingdom. Snapshot: September 20, 2026. https://revenuebase.ai/companies/managed-siem-service-providers/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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