Company lists · Data refreshed November 2026
Top 24 Ciso services based in the United Kingdom
RevenueBase identified 3,097 company matches for ciso services associated with the United Kingdom as of November 2026 and tracks 37,262 professional contacts across them, including 15,011 with verified work emails. London is the largest hub.
This list covers company matches for ciso services 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 6, 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 24 largest ciso services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 840 contacts → | ||||
Exact match “Complexity isn’t the enemy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 811 contacts → | ||||
Exact match “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 804 contacts → | ||||
Exact match “Bytes is a leading provider of world-class IT solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 629 contacts → | ||||
Exact match “Unlock your potential with XMA.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 468 contacts → | ||||
Exact match “We’ve been on a mission to bring together people and technology since the day we were founded over 25 years ago.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 426 contacts → | ||||
Exact match “At Resillion, we're more than just a global leader in quality engineering, testing, and cyber security – we're your dedicated partner from the start of your project to its…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 397 contacts → | ||||
Exact match “boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 352 contacts → | ||||
Exact match “We're one of the UK’s leading Voice, Connect, Cloud and Digital solution providers, helping over businesses grow through the use of innovative technology and expert advice.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 327 contacts → | ||||
Exact match “Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 313 contacts → | ||||
Exact match “At Kocho, we believe greatness lies in everyone.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 292 contacts → | ||||
Exact match “At Intercity, we help you Do More with Technology, Cloud & Security, Communications and Managed IT services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 257 contacts → | ||||
Exact match “We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 256 contacts → | ||||
Exact match “Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 227 contacts → | ||||
Exact match “We are an IT business with a difference.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 227 contacts → | ||||
Exact match “Wanstor: Experience First | AI Fluent | Secure by Default Wanstor is a trusted Managed IT Services company that helps ambitious organisations leverage technology to achieve better…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 226 contacts → | ||||
Exact match “Littlefish is a multi-award-winning Managed IT Services Provider that continues to grow consistently and significantly through tangibly delivering on our promises of enhanced user…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 225 contacts → | ||||
Exact match “Technology services for the future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 223 contacts → | ||||
Exact match “Multi-award-winning GCI is one of the UK’s leading ICT Service Providers, with offices across the UK.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 222 contacts → | ||||
Exact match “IT support for businesses in London.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 222 contacts → | ||||
Exact match “IFB - Managed IT Services Provider committed to maximising and supporting our customers' uptime.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 213 contacts → | ||||
Exact match “Proact is Europe’s leading specialist in data and information management with focus on cloud services and data centre solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 207 contacts → | ||||
Exact match “FluidOne is a leading UK-based security-first technology partner delivering integrated cyber, IT and secure networking services to businesses, and 200 channel resellers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 204 contacts → | ||||
Exact match “Our IT professional services deliver expertise in effective business change, facilitated by technology.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 192 contacts → | ||||
Exact match “LIMA has been solving business challenges since 1997, through the design and delivery of award-winning IT solutions and services across a range of sectors and industries.” Recorded in the RevenueBase company graph · Nov 6, 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 “ciso services”. 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 24 of 3,097 ciso services based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 15,011 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Ciso services based in the United Kingdom at a glance
As of Nov 6, 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 3,097 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 “ciso services” 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 15,011 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 6, 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.
Ciso services 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 “ciso services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many ciso services are there based in the United Kingdom?
RevenueBase identified 3,097 company matches for ciso services 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?
Nasstar tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most ciso services?
London leads with 950 company records, followed by Manchester (92) and Birmingham (47).
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 15,011 professional contacts with verified work emails tracked across these 3,097 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 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 3,097 ciso services based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Ciso services by geography
- Ciso services based in the United States
- Ciso services based in Brazil
- Ciso services based in France
- Ciso services based in Germany
- Ciso services based in Canada
- Ciso services based in Australia
- Ciso services based in Italy
- Ciso services based in Spain
- Ciso services based in the Netherlands
- Ciso services based in Mexico
- Ciso services based in Switzerland
- Ciso services based in South Africa
Browse the directory
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
Company intelligence · public preview
Top 24 ciso services 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 3,097 matching company records for ciso services based in the United Kingdom, with 37,262 tracked contacts and 15,011 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 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 24 ciso services 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 |  Nasstarnasstar.comHQ: Wakefield, United KingdomReported employees: 1,001-5,000 | Wakefield, United Kingdom | 1,001-5,000 | Exact match | 840 contacts → |
“Complexity isn’t the enemy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  MTImti.comHQ: Staines-upon-thames, United KingdomReported employees: 201-500 | Staines-upon-thames, United Kingdom | 201-500 | Exact match | 811 contacts → |
“MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Bytes Software Servicesbytes.co.ukHQ: Leatherhead, United KingdomReported employees: 501-1,000 | Leatherhead, United Kingdom | 501-1,000 | Exact match | 804 contacts → |
“Bytes is a leading provider of world-class IT solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  XMAxma.co.ukHQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 629 contacts → |
“Unlock your potential with XMA.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  ACORAacora.comHQ: Burgess Hill, United KingdomReported employees: 501-1,000 | Burgess Hill, United Kingdom | 501-1,000 | Exact match | 468 contacts → |
“We’ve been on a mission to bring together people and technology since the day we were founded over 25 years ago.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Resillionresillion.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 426 contacts → |
“At Resillion, we're more than just a global leader in quality engineering, testing, and cyber security – we're your dedicated partner from the start of your project to its…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  BOXXEboxxe.comHQ: Hemel Hempstead, United KingdomReported employees: 201-500 | Hemel Hempstead, United Kingdom | 201-500 | Exact match | 397 contacts → |
“boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  CHESSchessict.co.ukHQ: Alderley Edge, United KingdomReported employees: 201-500 | Alderley Edge, United Kingdom | 201-500 | Exact match | 352 contacts → |
“We're one of the UK’s leading Voice, Connect, Cloud and Digital solution providers, helping over businesses grow through the use of innovative technology and expert advice.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Bridewellbridewell.comHQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 327 contacts → |
“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  KOCHOkocho.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 313 contacts → |
“At Kocho, we believe greatness lies in everyone.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Intercityintercity.technologyHQ: Birmingham, United KingdomReported employees: 201-500 | Birmingham, United Kingdom | 201-500 | Exact match | 292 contacts → |
“At Intercity, we help you Do More with Technology, Cloud & Security, Communications and Managed IT services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Xalientxalient.comHQ: Leeds, United KingdomReported employees: 201-500 | Leeds, United Kingdom | 201-500 | Exact match | 257 contacts → |
“We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  ROC Technologiesroctechnologies.comHQ: Greenham, United KingdomReported employees: 201-500 | Greenham, United Kingdom | 201-500 | Exact match | 256 contacts → |
“Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Waterstonswaterstons.comHQ: Durham, United KingdomReported employees: 201-500 | Durham, United Kingdom | 201-500 | Exact match | 227 contacts → |
“We are an IT business with a difference.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Wanstorwanstor.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 227 contacts → |
“Wanstor: Experience First | AI Fluent | Secure by Default Wanstor is a trusted Managed IT Services company that helps ambitious organisations leverage technology to achieve better…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Littlefishlittlefish.co.uk HQ: Nottingham, United KingdomReported employees: 201-500 | Nottingham, United Kingdom | 201-500 | Exact match | 226 contacts → |
“Littlefish is a multi-award-winning Managed IT Services Provider that continues to grow consistently and significantly through tangibly delivering on our promises of enhanced user…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  ROCKrock.co.ukHQ: Pencoed, United KingdomReported employees: 51-200 | Pencoed, United Kingdom | 51-200 | Exact match | 225 contacts → |
“Technology services for the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  GCIgcicom.netHQ: Lincoln, United KingdomReported employees: 501-1,000 | Lincoln, United Kingdom | 501-1,000 | Exact match | 223 contacts → |
“Multi-award-winning GCI is one of the UK’s leading ICT Service Providers, with offices across the UK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  operum.techoperum.techHQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 222 contacts → |
“IT support for businesses in London.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  IFBifb.netHQ: Aberdeen, United KingdomReported employees: Not recorded | Aberdeen, United Kingdom | Not recorded | Exact match | 222 contacts → |
“IFB - Managed IT Services Provider committed to maximising and supporting our customers' uptime.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Proact IT UKproact.co.ukHQ: Chesterfield, United KingdomReported employees: 1,001-5,000 | Chesterfield, United Kingdom | 1,001-5,000 | Exact match | 213 contacts → |
“Proact is Europe’s leading specialist in data and information management with focus on cloud services and data centre solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Fluidonefluidone.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 207 contacts → |
“FluidOne is a leading UK-based security-first technology partner delivering integrated cyber, IT and secure networking services to businesses, and 200 channel resellers.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Capita IT Professional Servicescapita-itps.co.uk HQ: Haywards Heath, United KingdomReported employees: 10001+ | Haywards Heath, United Kingdom | 10001+ | Exact match | 204 contacts → |
“Our IT professional services deliver expertise in effective business change, facilitated by technology.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  LIMAlima.co.ukHQ: Salford Quays, United KingdomReported employees: 51-200 | Salford Quays, United Kingdom | 51-200 | Exact match | 192 contacts → |
“LIMA has been solving business challenges since 1997, through the design and delivery of award-winning IT solutions and services across a range of sectors and industries.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 3,097 company matches
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Ciso services: dataset insights
November 6, 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
3,051 records in the displayed employee bands.
46 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 3,097 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 6, 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 ↗
Ciso services by metro
Questions about this company list
What does Exact match mean for ciso services?
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 ciso services did RevenueBase find based in the United Kingdom?
The saved snapshot records 3,097 matching company records, 37,262 tracked contacts and 15,011 verified emails. The public preview displays 24 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 6, 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
Ciso services by geography
- Ciso services based in the United States
- Ciso services based in Brazil
- Ciso services based in France
- Ciso services based in Germany
- Ciso services based in Canada
- Ciso services based in Australia
- Ciso services based in Italy
- Ciso services based in Spain
- Ciso services based in the Netherlands
- Ciso services based in Mexico
- Ciso services based in Switzerland
- Ciso services based in South Africa
Browse the directory
Cite this list
RevenueBase Data Team. Top 24 ciso services based in the United Kingdom. Snapshot: November 6, 2026. https://revenuebase.ai/companies/ciso-services/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
Company intelligence · public preview
Top 24 ciso services based in the United Kingdom
RevenueBase records 3,097 matching company records for ciso services based in the United Kingdom, with 37,262 tracked contacts and 15,011 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 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 24 ciso services 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 | Nasstarnasstar.com HQ: Wakefield, United KingdomReported employees: 1,001-5,000 | Wakefield, United Kingdom | 1,001-5,000 | Exact match | 840 contacts → |
“Complexity isn’t the enemy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | MTImti.com HQ: Staines-upon-thames, United KingdomReported employees: 201-500 | Staines-upon-thames, United Kingdom | 201-500 | Exact match | 811 contacts → |
“MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Bytes Software Servicesbytes.co.uk HQ: Leatherhead, United KingdomReported employees: 501-1,000 | Leatherhead, United Kingdom | 501-1,000 | Exact match | 804 contacts → |
“Bytes is a leading provider of world-class IT solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | XMAxma.co.uk HQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 629 contacts → |
“Unlock your potential with XMA.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | ACORAacora.com HQ: Burgess Hill, United KingdomReported employees: 501-1,000 | Burgess Hill, United Kingdom | 501-1,000 | Exact match | 468 contacts → |
“We’ve been on a mission to bring together people and technology since the day we were founded over 25 years ago.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Resillionresillion.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 426 contacts → |
“At Resillion, we're more than just a global leader in quality engineering, testing, and cyber security – we're your dedicated partner from the start of your project to its…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | BOXXEboxxe.com HQ: Hemel Hempstead, United KingdomReported employees: 201-500 | Hemel Hempstead, United Kingdom | 201-500 | Exact match | 397 contacts → |
“boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | CHESSchessict.co.uk HQ: Alderley Edge, United KingdomReported employees: 201-500 | Alderley Edge, United Kingdom | 201-500 | Exact match | 352 contacts → |
“We're one of the UK’s leading Voice, Connect, Cloud and Digital solution providers, helping over businesses grow through the use of innovative technology and expert advice.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Bridewellbridewell.com HQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 327 contacts → |
“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | KOCHOkocho.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 313 contacts → |
“At Kocho, we believe greatness lies in everyone.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Intercityintercity.technology HQ: Birmingham, United KingdomReported employees: 201-500 | Birmingham, United Kingdom | 201-500 | Exact match | 292 contacts → |
“At Intercity, we help you Do More with Technology, Cloud & Security, Communications and Managed IT services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Xalientxalient.com HQ: Leeds, United KingdomReported employees: 201-500 | Leeds, United Kingdom | 201-500 | Exact match | 257 contacts → |
“We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | ROC Technologiesroctechnologies.com HQ: Greenham, United KingdomReported employees: 201-500 | Greenham, United Kingdom | 201-500 | Exact match | 256 contacts → |
“Roc Technologies delivers transformational IT solutions to public and private sector organisations across the UK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Waterstonswaterstons.com HQ: Durham, United KingdomReported employees: 201-500 | Durham, United Kingdom | 201-500 | Exact match | 227 contacts → |
“We are an IT business with a difference.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Wanstorwanstor.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 227 contacts → |
“Wanstor: Experience First | AI Fluent | Secure by Default Wanstor is a trusted Managed IT Services company that helps ambitious organisations leverage technology to achieve better…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Littlefishlittlefish.co.uk HQ: Nottingham, United KingdomReported employees: 201-500 | Nottingham, United Kingdom | 201-500 | Exact match | 226 contacts → |
“Littlefish is a multi-award-winning Managed IT Services Provider that continues to grow consistently and significantly through tangibly delivering on our promises of enhanced user…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | ROCKrock.co.uk HQ: Pencoed, United KingdomReported employees: 51-200 | Pencoed, United Kingdom | 51-200 | Exact match | 225 contacts → |
“Technology services for the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | GCIgcicom.net HQ: Lincoln, United KingdomReported employees: 501-1,000 | Lincoln, United Kingdom | 501-1,000 | Exact match | 223 contacts → |
“Multi-award-winning GCI is one of the UK’s leading ICT Service Providers, with offices across the UK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | operum.techoperum.tech HQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 222 contacts → |
“IT support for businesses in London.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | IFBifb.net HQ: Aberdeen, United KingdomReported employees: Not recorded | Aberdeen, United Kingdom | Not recorded | Exact match | 222 contacts → |
“IFB - Managed IT Services Provider committed to maximising and supporting our customers' uptime.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Proact IT UKproact.co.uk HQ: Chesterfield, United KingdomReported employees: 1,001-5,000 | Chesterfield, United Kingdom | 1,001-5,000 | Exact match | 213 contacts → |
“Proact is Europe’s leading specialist in data and information management with focus on cloud services and data centre solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Fluidonefluidone.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 207 contacts → |
“FluidOne is a leading UK-based security-first technology partner delivering integrated cyber, IT and secure networking services to businesses, and 200 channel resellers.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Capita IT Professional Servicescapita-itps.co.uk HQ: Haywards Heath, United KingdomReported employees: 10001+ | Haywards Heath, United Kingdom | 10001+ | Exact match | 204 contacts → |
“Our IT professional services deliver expertise in effective business change, facilitated by technology.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | LIMAlima.co.uk HQ: Salford Quays, United KingdomReported employees: 51-200 | Salford Quays, United Kingdom | 51-200 | Exact match | 192 contacts → |
“LIMA has been solving business challenges since 1997, through the design and delivery of award-winning IT solutions and services across a range of sectors and industries.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 3,097 company matches
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Ciso services: dataset insights
November 6, 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
3,051 records in the displayed employee bands.
46 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 3,097 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 6, 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 ↗
Ciso services by metro
Questions about this company list
What does Exact match mean for ciso services?
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 ciso services did RevenueBase find based in the United Kingdom?
The saved snapshot records 3,097 matching company records, 37,262 tracked contacts and 15,011 verified emails. The public preview displays 24 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 6, 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.
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Ciso services by geography
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- Ciso services based in Canada
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Cite this list
RevenueBase Data Team. Top 24 ciso services based in the United Kingdom. Snapshot: November 6, 2026. https://revenuebase.ai/companies/ciso-services/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗