Company lists · Data refreshed September 2026
Top 25 IT services firms based in the United Kingdom
RevenueBase identified 5,489 company matches for IT services firms associated with the United Kingdom as of September 2026 and tracks 57,878 professional contacts across them, including 17,257 with verified work emails and 3,196 with mobile numbers. London is the largest hub.
This list covers company matches for IT services firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest IT services firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,242 contacts → | ||||
Exact match “Founded in 2008 OneAdvanced has grown into one of the UK’s largest providers of business software and services serving global customers with an annual turnover of £330M+.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 1,039 contacts → | ||||
Exact match “Global business doesn’t have to be complicated.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 870 contacts → | ||||
Exact match “At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 844 contacts → | ||||
Exact match “Complexity isn’t the enemy.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 748 contacts → | ||||
Exact match “TSG: The Technology Partner for Ambitious Businesses We're not a reseller.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 616 contacts → | ||||
Exact match “Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 540 contacts → | ||||
Exact match “Dimension Data uses the power of technology to help organisations achieve great things.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 538 contacts → | ||||
Exact match “Unlock your potential with XMA.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 510 contacts → | ||||
Exact match “ESP provides IT support services across the globe.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 421 contacts → | ||||
Exact match “Trustmarque delivers the value of technology to bring real-life impact.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 377 contacts → | ||||
Exact match “Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 375 contacts → | ||||
Exact match “CCS Media is now officially part of Advania UK, the tech company with people at heart.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 333 contacts → | ||||
Exact match “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 324 contacts → | ||||
Exact match “The Game Changers in IT services On the 1st of December ADA changed it's name to Acora.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 323 contacts → | ||||
Exact match “Purview is a premier provider of IT Engineering and Talent Solutions to mid-market and Fortune 500 companies globally.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 322 contacts → | ||||
Exact match “prosource.it is a managed IT services provider with a particular focus on infrastructure, operational and project requirements across the corporate enterprise market.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 313 contacts → | ||||
Exact match “The Verelogic Group, with over 30 years of experience, offers business support in technology and recruitment in the IT and engineering sectors.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 302 contacts → | ||||
Exact match “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 295 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 286 contacts → | ||||
Exact match “At Total IT Global, we elevate your digital journey with cutting-edge innovation, to achieve your vision of ‘the enterprise of the future’.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 279 contacts → | ||||
Exact match “At Six Degrees we’re all about enabling our clients’ success through technology.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 251 contacts → | ||||
Exact match “A&O IT Group, a global leader in managed IT services, brings over 50 years of expertise and operates in over 130 countries.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 241 contacts → | ||||
Exact match “At Sharp Brains, we are your premier IT Services & Solutions Provider based in the UK, dedicated to meeting your business's unique needs with tailor-made solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 238 contacts → | ||||
Exact match “Penta Consulting provides the people to power your most ambitious projects.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 231 contacts → | ||||
Exact match “Since 2008, Flat Rock Technology, a software engineering, SI, Cloud DevOps, Cyber Security, and Customer Experience (CX) company, has been at the forefront of providing innovative…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “IT services firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 5,489 IT services firms based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 17,257 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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IT services firms based in the United Kingdom at a glance
As of Sep 27, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 29.0dCompany record updated
Median 93.0dHow 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 “IT services firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 17,257 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
IT services firms by metro
- IT services firms in London1441
- IT services firms in Manchester98
- IT services firms in Birmingham83
- IT services firms in Bristol59
- IT services firms in Glasgow53
- IT services firms in Leeds46
- IT services firms in Reading44
- IT services firms in Edinburgh42
- IT services firms in Sheffield41
- IT services firms in Milton Keynes40
- IT services firms in Liverpool36
- IT services firms in Nottingham34
- IT services firms in Cambridge32
- IT services firms in Leicester31
- IT services firms in Bournemouth27
- IT services firms in Derby26
- IT services firms in Harrow26
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 “IT services firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many IT services firms are there based in the United Kingdom?
RevenueBase identified 5,489 company matches for IT services firms 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?
Oneadvanced tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most IT services firms?
London leads with 1441 company records, followed by Manchester (98) and Birmingham (83).
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 17,257 professional contacts with verified work emails tracked across these 5,489 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 5,489 IT services firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
IT services firms by geography
- IT services firms based in the United States
- IT services firms based in Brazil
- IT services firms based in Germany
- IT services firms based in France
- IT services firms based in Canada
- IT services firms based in Australia
- IT services firms based in Italy
- IT services firms based in Spain
- IT services firms based in the Netherlands
- IT services firms based in South Africa
- IT services firms based in Poland
- IT services firms based in Mexico
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 25 IT services firms 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 5,489 matching company records for IT services firms based in the United Kingdom, with 57,878 tracked contacts and 17,257 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 IT services firms 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 |  Oneadvancedoneadvanced.comHQ: Birmingham, United KingdomReported employees: 1,001-5,000 | Birmingham, United Kingdom | 1,001-5,000 | Exact match | 2,242 contacts → |
“Founded in 2008 OneAdvanced has grown into one of the UK’s largest providers of business software and services serving global customers with an annual turnover of £330M+.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  NSC Globalnscglobal.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,039 contacts → |
“Global business doesn’t have to be complicated.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Oliver Jamesoliverjames.comHQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 870 contacts → |
“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Nasstarnasstar.comHQ: Wakefield, United KingdomReported employees: 1,001-5,000 | Wakefield, United Kingdom | 1,001-5,000 | Exact match | 844 contacts → |
“Complexity isn’t the enemy.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  TSGtsg.comHQ: Gateshead, United KingdomReported employees: 201-500 | Gateshead, United Kingdom | 201-500 | Exact match | 748 contacts → |
“TSG: The Technology Partner for Ambitious Businesses We're not a reseller.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Excis Complianceexcis.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 616 contacts → |
“Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Dimension Data UKIdimensiondata.comHQ: Fleet, United KingdomReported employees: 1,001-5,000 | Fleet, United Kingdom | 1,001-5,000 | Exact match | 540 contacts → |
“Dimension Data uses the power of technology to help organisations achieve great things.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  XMAxma.co.ukHQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 538 contacts → |
“Unlock your potential with XMA.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  ESP Global Servicesespglobalservices.comHQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 510 contacts → |
“ESP provides IT support services across the globe.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Trustmarquetrustmarque.comHQ: York, United KingdomReported employees: 501-1,000 | York, United Kingdom | 501-1,000 | Exact match | 421 contacts → |
“Trustmarque delivers the value of technology to bring real-life impact.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Hirexa Solutionshirexa.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 377 contacts → |
“Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  CCS Media Limited Advania UKccsmedia.comHQ: Chesterfield, United KingdomReported employees: 201-500 | Chesterfield, United Kingdom | 201-500 | Exact match | 375 contacts → |
“CCS Media is now officially part of Advania UK, the tech company with people at heart.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Ubique Systemsubique-systems.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 333 contacts → |
“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  ADA Technology Servicesacora.comHQ: Burgess Hill, United KingdomReported employees: 51-200 | Burgess Hill, United Kingdom | 51-200 | Exact match | 324 contacts → |
“The Game Changers in IT services On the 1st of December ADA changed it's name to Acora.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Purviewpurviewservices.comHQ: Edinburgh, United KingdomReported employees: 1,001-5,000 | Edinburgh, United Kingdom | 1,001-5,000 | Exact match | 323 contacts → |
“Purview is a premier provider of IT Engineering and Talent Solutions to mid-market and Fortune 500 companies globally.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  prosource.itprosource.itHQ: Aberdeen, United KingdomReported employees: 501-1,000 | Aberdeen, United Kingdom | 501-1,000 | Exact match | 322 contacts → |
“prosource.it is a managed IT services provider with a particular focus on infrastructure, operational and project requirements across the corporate enterprise market.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Verelogic Groupverelogic.comHQ: Swindon, United KingdomReported employees: Not recorded | Swindon, United Kingdom | Not recorded | Exact match | 313 contacts → |
“The Verelogic Group, with over 30 years of experience, offers business support in technology and recruitment in the IT and engineering sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Cartesiancartesian.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 302 contacts → |
“Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  BOXXEboxxe.comHQ: Hemel Hempstead, United KingdomReported employees: 201-500 | Hemel Hempstead, United Kingdom | 201-500 | Exact match | 295 contacts → |
“boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Total IT Globaltotalitglobal.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 286 contacts → |
“At Total IT Global, we elevate your digital journey with cutting-edge innovation, to achieve your vision of ‘the enterprise of the future’.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  SIX Degrees6dg.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 279 contacts → |
“At Six Degrees we’re all about enabling our clients’ success through technology.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  A&o IT Groupaoitgroup.comHQ: Bracknell, United KingdomReported employees: 201-500 | Bracknell, United Kingdom | 201-500 | Exact match | 251 contacts → |
“A&O IT Group, a global leader in managed IT services, brings over 50 years of expertise and operates in over 130 countries.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Sharp Brainssharpbrains.co.ukHQ: Slough, United KingdomReported employees: 51-200 | Slough, United Kingdom | 51-200 | Exact match | 241 contacts → |
“At Sharp Brains, we are your premier IT Services & Solutions Provider based in the UK, dedicated to meeting your business's unique needs with tailor-made solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Penta Consultingpentaconsulting.comHQ: Epsom, United KingdomReported employees: 51-200 | Epsom, United Kingdom | 51-200 | Exact match | 238 contacts → |
“Penta Consulting provides the people to power your most ambitious projects.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Flat Rock Technologyflatrocktech.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 231 contacts → |
“Since 2008, Flat Rock Technology, a software engineering, SI, Cloud DevOps, Cyber Security, and Customer Experience (CX) company, has been at the forefront of providing innovative…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 5,489 company matches
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IT services firms: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
5,449 records in the displayed employee bands.
40 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 29.0dCompany record updated
Median 93.0dHow 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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
IT services firms by metro
- IT services firms in London1441
- IT services firms in Manchester98
- IT services firms in Birmingham83
- IT services firms in Bristol59
- IT services firms in Glasgow53
- IT services firms in Leeds46
- IT services firms in Reading44
- IT services firms in Edinburgh42
- IT services firms in Sheffield41
- IT services firms in Milton Keynes40
- IT services firms in Liverpool36
- IT services firms in Nottingham34
- IT services firms in Cambridge32
- IT services firms in Leicester31
- IT services firms in Bournemouth27
- IT services firms in Derby26
- IT services firms in Harrow26
Questions about this company list
What does Exact match mean for IT services firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many IT services firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 5,489 matching company records, 57,878 tracked contacts and 17,257 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
IT services firms by geography
- IT services firms based in the United States
- IT services firms based in Brazil
- IT services firms based in Germany
- IT services firms based in France
- IT services firms based in Canada
- IT services firms based in Australia
- IT services firms based in Italy
- IT services firms based in Spain
- IT services firms based in the Netherlands
- IT services firms based in South Africa
- IT services firms based in Poland
- IT services firms based in Mexico
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 IT services firms based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/it-services-firms/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 25 IT services firms based in the United Kingdom
RevenueBase records 5,489 matching company records for IT services firms based in the United Kingdom, with 57,878 tracked contacts and 17,257 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 IT services firms 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 | Oneadvancedoneadvanced.com HQ: Birmingham, United KingdomReported employees: 1,001-5,000 | Birmingham, United Kingdom | 1,001-5,000 | Exact match | 2,242 contacts → |
“Founded in 2008 OneAdvanced has grown into one of the UK’s largest providers of business software and services serving global customers with an annual turnover of £330M+.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | NSC Globalnscglobal.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,039 contacts → |
“Global business doesn’t have to be complicated.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Oliver Jamesoliverjames.com HQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 870 contacts → |
“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Nasstarnasstar.com HQ: Wakefield, United KingdomReported employees: 1,001-5,000 | Wakefield, United Kingdom | 1,001-5,000 | Exact match | 844 contacts → |
“Complexity isn’t the enemy.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | TSGtsg.com HQ: Gateshead, United KingdomReported employees: 201-500 | Gateshead, United Kingdom | 201-500 | Exact match | 748 contacts → |
“TSG: The Technology Partner for Ambitious Businesses We're not a reseller.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Excis Complianceexcis.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 616 contacts → |
“Excis is a trusted global IT services company, delivering agile, multilingual support across 150+ countries.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Dimension Data UKIdimensiondata.com HQ: Fleet, United KingdomReported employees: 1,001-5,000 | Fleet, United Kingdom | 1,001-5,000 | Exact match | 540 contacts → |
“Dimension Data uses the power of technology to help organisations achieve great things.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | XMAxma.co.uk HQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 538 contacts → |
“Unlock your potential with XMA.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | ESP Global Servicesespglobalservices.com HQ: Reading, United KingdomReported employees: 501-1,000 | Reading, United Kingdom | 501-1,000 | Exact match | 510 contacts → |
“ESP provides IT support services across the globe.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Trustmarquetrustmarque.com HQ: York, United KingdomReported employees: 501-1,000 | York, United Kingdom | 501-1,000 | Exact match | 421 contacts → |
“Trustmarque delivers the value of technology to bring real-life impact.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Hirexa Solutionshirexa.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 377 contacts → |
“Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | CCS Media Limited Advania UKccsmedia.com HQ: Chesterfield, United KingdomReported employees: 201-500 | Chesterfield, United Kingdom | 201-500 | Exact match | 375 contacts → |
“CCS Media is now officially part of Advania UK, the tech company with people at heart.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Ubique Systemsubique-systems.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 333 contacts → |
“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | ADA Technology Servicesacora.com HQ: Burgess Hill, United KingdomReported employees: 51-200 | Burgess Hill, United Kingdom | 51-200 | Exact match | 324 contacts → |
“The Game Changers in IT services On the 1st of December ADA changed it's name to Acora.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Purviewpurviewservices.com HQ: Edinburgh, United KingdomReported employees: 1,001-5,000 | Edinburgh, United Kingdom | 1,001-5,000 | Exact match | 323 contacts → |
“Purview is a premier provider of IT Engineering and Talent Solutions to mid-market and Fortune 500 companies globally.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | prosource.itprosource.it HQ: Aberdeen, United KingdomReported employees: 501-1,000 | Aberdeen, United Kingdom | 501-1,000 | Exact match | 322 contacts → |
“prosource.it is a managed IT services provider with a particular focus on infrastructure, operational and project requirements across the corporate enterprise market.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Verelogic Groupverelogic.com HQ: Swindon, United KingdomReported employees: Not recorded | Swindon, United Kingdom | Not recorded | Exact match | 313 contacts → |
“The Verelogic Group, with over 30 years of experience, offers business support in technology and recruitment in the IT and engineering sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cartesiancartesian.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 302 contacts → |
“Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | BOXXEboxxe.com HQ: Hemel Hempstead, United KingdomReported employees: 201-500 | Hemel Hempstead, United Kingdom | 201-500 | Exact match | 295 contacts → |
“boxxe is a leading provider of hardware, software, and managed IT services for public and private sector organisations.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Total IT Globaltotalitglobal.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 286 contacts → |
“At Total IT Global, we elevate your digital journey with cutting-edge innovation, to achieve your vision of ‘the enterprise of the future’.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | SIX Degrees6dg.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 279 contacts → |
“At Six Degrees we’re all about enabling our clients’ success through technology.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | A&o IT Groupaoitgroup.com HQ: Bracknell, United KingdomReported employees: 201-500 | Bracknell, United Kingdom | 201-500 | Exact match | 251 contacts → |
“A&O IT Group, a global leader in managed IT services, brings over 50 years of expertise and operates in over 130 countries.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Sharp Brainssharpbrains.co.uk HQ: Slough, United KingdomReported employees: 51-200 | Slough, United Kingdom | 51-200 | Exact match | 241 contacts → |
“At Sharp Brains, we are your premier IT Services & Solutions Provider based in the UK, dedicated to meeting your business's unique needs with tailor-made solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Penta Consultingpentaconsulting.com HQ: Epsom, United KingdomReported employees: 51-200 | Epsom, United Kingdom | 51-200 | Exact match | 238 contacts → |
“Penta Consulting provides the people to power your most ambitious projects.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Flat Rock Technologyflatrocktech.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 231 contacts → |
“Since 2008, Flat Rock Technology, a software engineering, SI, Cloud DevOps, Cyber Security, and Customer Experience (CX) company, has been at the forefront of providing innovative…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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IT services firms: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
5,449 records in the displayed employee bands.
40 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 29.0dCompany record updated
Median 93.0dHow 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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
IT services firms by metro
- IT services firms in London1441
- IT services firms in Manchester98
- IT services firms in Birmingham83
- IT services firms in Bristol59
- IT services firms in Glasgow53
- IT services firms in Leeds46
- IT services firms in Reading44
- IT services firms in Edinburgh42
- IT services firms in Sheffield41
- IT services firms in Milton Keynes40
- IT services firms in Liverpool36
- IT services firms in Nottingham34
- IT services firms in Cambridge32
- IT services firms in Leicester31
- IT services firms in Bournemouth27
- IT services firms in Derby26
- IT services firms in Harrow26
Questions about this company list
What does Exact match mean for IT services firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many IT services firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 5,489 matching company records, 57,878 tracked contacts and 17,257 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
IT services firms by geography
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- IT services firms based in Germany
- IT services firms based in France
- IT services firms based in Canada
- IT services firms based in Australia
- IT services firms based in Italy
- IT services firms based in Spain
- IT services firms based in the Netherlands
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Browse the directory
Cite this list
RevenueBase Data Team. Top 25 IT services firms based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/it-services-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗