Company lists · Data refreshed September 2026
Top 25 System administration outsourcing firms based in the United Kingdom
RevenueBase identified 779 company matches for system administration outsourcing firms associated with the United Kingdom as of September 2026 and tracks 6,627 professional contacts across them, including 2,999 with verified work emails and 398 with mobile numbers. London is the largest hub.
This list covers company matches for system administration outsourcing 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 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 25 largest system administration outsourcing firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,039 contacts → | ||||
Exact match “Global business doesn’t have to be complicated.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 2 | 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 6, 2026 · View company records in RevenueBase | |||||
| 3 | 141 contacts → | ||||
Exact match “Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 4 | 93 contacts → | ||||
Exact match “ramsac provide so much more than just IT support.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 5 | 92 contacts → | ||||
Exact match “The costs for shifting to the cloud and juggling a hybrid environment continue to escalate due to rising support fees and expensive tech resources.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 6 | 76 contacts → | ||||
Exact match “CST is an I.T.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 7 | 72 contacts → | ||||
Exact match “ADM Computing is an independent, family-owned IT services provider headquartered in Canterbury, supporting organisations across Kent, London and the South East since 1984.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 8 | 67 contacts → | ||||
Exact match “3Gi Technology is a global IT Managed Service Provider (MSP) offering enterprise level IT Professional Services to numerous companies all over the world.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 9 | 66 contacts → | ||||
Exact match “We create, design, deliver and support informed & intelligent strategies to navigate shifting technology, keeping organisations like yours effective & secure.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 10 | 63 contacts → | ||||
Exact match “Empowering Global Business with Seamless IT Excellence At Layers Logic IT Limited, we don’t just provide tech support-we build the digital backbone for global enterprises.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 11 | 54 contacts → | ||||
Exact match “We are an outsourced IT Services Provider, who specialise in delivering high quality end user support, and the design build and run of IT Infrastructure to the Alternative…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 12 | 50 contacts → | ||||
Exact match “BSL, your personal IT partner.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 13 | 49 contacts → | ||||
Exact match “Concorde Technology Group is one of the UK’s leading Managed IT Services providers, specialising in Infrastructure Solutions, IT support, Cybersecurity, Communications and Cloud…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 14 | 41 contacts → | ||||
Exact match “RTS is a leading UK-based IT service provider, specialising in distributed networks, hosting services, and infrastructure consulting for medium to large enterprises.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 15 | 40 contacts → | ||||
Exact match “Select Technology is one of the South East’s leading technology service providers, with 30 years of expertise in designing, implementing and supporting IT networks of all sizes.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 16 | 40 contacts → | ||||
Exact match “Phoenix47 is an IT infrastructure services company providing Support Desk, Managed Services and Professional Services.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 17 | 39 contacts → | ||||
Exact match “At Holker IT our aim is to improve our clients’ businesses through strategic advice, implementation and on-going support of IT systems and processes, from single to multi-server…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 18 | 38 contacts → | ||||
Exact match “Convene IT Ltd With over 15 years of experience in IT support services We we offer high quality business IT service, combining expertise and great customer service but without the…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 19 | 38 contacts → | ||||
Exact match “If you're running a business, the last thing you need is slow, unreliable IT creating expensive problems.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 20 | 37 contacts → | ||||
Exact match “Azets Technology Solutions supply a range of IT services and computer solutions which are designed to meet the needs of the SME, the IT support and services that Azets offer meet…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 21 | 35 contacts → | ||||
Exact match “Acronyms is an IT support company offering a range of IT services, designed to save organisations time that they can spend on growing their own businesses.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 22 | 34 contacts → | ||||
Exact match “Cheeky Munkey is a privately owned and managed IT support company based in St Albans, Hertfordshire, providing professional IT support within London and the South East.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 23 | 34 contacts → | ||||
Exact match “Bristol's leading IT Support Provider, offering tailored IT solutions to meet your needs.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 24 | 32 contacts → | ||||
Exact match “Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase | |||||
| 25 | 31 contacts → | ||||
Exact match “Connect Systems are based in Chesham Bucks and were established in 1992 to provide professional IT services to the SMB market place.” Recorded in the RevenueBase company graph · Sep 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 “system administration outsourcing 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 779 system administration outsourcing firms based in the United Kingdom
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System administration outsourcing firms based in the United Kingdom at a glance
As of Sep 6, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “system administration outsourcing 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 2,999 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 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.
System administration outsourcing firms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “system administration outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many system administration outsourcing firms are there based in the United Kingdom?
RevenueBase identified 779 company matches for system administration outsourcing 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?
NSC Global tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most system administration outsourcing firms?
London leads with 167 company records, followed by Bristol (15) and Glasgow (11).
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 2,999 professional contacts with verified work emails tracked across these 779 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 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 779 system administration outsourcing firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
System administration outsourcing firms by geography
- System administration outsourcing firms based in the United States
- System administration outsourcing firms based in Brazil
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
- System administration outsourcing firms based in Australia
- System administration outsourcing firms based in the Netherlands
- System administration outsourcing firms based in Spain
- System administration outsourcing firms based in Italy
- System administration outsourcing firms based in South Africa
- System administration outsourcing firms based in Poland
- System administration outsourcing firms based in Belgium
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
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- Lists A-Z
- New lists
- System administration outsourcing firms based in the United States
- System administration outsourcing firms based in Brazil
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
- System administration outsourcing firms based in Australia
Company intelligence · public preview
Top 25 system administration outsourcing 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 779 matching company records for system administration outsourcing firms based in the United Kingdom, with 6,627 tracked contacts and 2,999 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 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 25 system administration outsourcing 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 |  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 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Deepscale Technologies LTDdeep-scale.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 141 contacts → |
“Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Ramsacramsac.comHQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 93 contacts → |
“ramsac provide so much more than just IT support.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Bluesourcebluesource.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 92 contacts → |
“The costs for shifting to the cloud and juggling a hybrid environment continue to escalate due to rising support fees and expensive tech resources.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  CSTcst.co.ukHQ: Wooburn Green, United KingdomReported employees: 51-200 | Wooburn Green, United Kingdom | 51-200 | Exact match | 76 contacts → |
“CST is an I.T.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  ADM Computingadm-computing.co.ukHQ: Canterbury, United KingdomReported employees: 51-200 | Canterbury, United Kingdom | 51-200 | Exact match | 72 contacts → |
“ADM Computing is an independent, family-owned IT services provider headquartered in Canterbury, supporting organisations across Kent, London and the South East since 1984.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  3gi Technology3gi.co.ukHQ: Brentwood, United KingdomReported employees: 11-50 | Brentwood, United Kingdom | 11-50 | Exact match | 67 contacts → |
“3Gi Technology is a global IT Managed Service Provider (MSP) offering enterprise level IT Professional Services to numerous companies all over the world.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  CMInewcmi.comHQ: Belfast, United KingdomReported employees: 51-200 | Belfast, United Kingdom | 51-200 | Exact match | 66 contacts → |
“We create, design, deliver and support informed & intelligent strategies to navigate shifting technology, keeping organisations like yours effective & secure.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Layers Logic IT Limitedlayerslogic.comHQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 63 contacts → |
“Empowering Global Business with Seamless IT Excellence At Layers Logic IT Limited, we don’t just provide tech support-we build the digital backbone for global enterprises.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Alternit ONEalternitone.comHQ: Fenchurch Street, United KingdomReported employees: 11-50 | Fenchurch Street, United Kingdom | 11-50 | Exact match | 54 contacts → |
“We are an outsourced IT Services Provider, who specialise in delivering high quality end user support, and the design build and run of IT Infrastructure to the Alternative…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  BSL ITbsl-it.comHQ: Finedon, United KingdomReported employees: 11-50 | Finedon, United Kingdom | 11-50 | Exact match | 50 contacts → |
“BSL, your personal IT partner.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Concorde Technology Grouptctg.co.ukHQ: Ossett, United KingdomReported employees: 51-200 | Ossett, United Kingdom | 51-200 | Exact match | 49 contacts → |
“Concorde Technology Group is one of the UK’s leading Managed IT Services providers, specialising in Infrastructure Solutions, IT support, Cybersecurity, Communications and Cloud…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  RTSrtsl.netHQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 41 contacts → |
“RTS is a leading UK-based IT service provider, specialising in distributed networks, hosting services, and infrastructure consulting for medium to large enterprises.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Select Technologyselect-technology.co.ukHQ: Paddock Wood, United KingdomReported employees: 11-50 | Paddock Wood, United Kingdom | 11-50 | Exact match | 40 contacts → |
“Select Technology is one of the South East’s leading technology service providers, with 30 years of expertise in designing, implementing and supporting IT networks of all sizes.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Phoenix47phoenix47.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 40 contacts → |
“Phoenix47 is an IT infrastructure services company providing Support Desk, Managed Services and Professional Services.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Holker ITholkerit.co.ukHQ: Burnley, United KingdomReported employees: 11-50 | Burnley, United Kingdom | 11-50 | Exact match | 39 contacts → |
“At Holker IT our aim is to improve our clients’ businesses through strategic advice, implementation and on-going support of IT systems and processes, from single to multi-server…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Convene IT LTDconveneit.co.ukHQ: Chorley, United KingdomReported employees: 11-50 | Chorley, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Convene IT Ltd With over 15 years of experience in IT support services We we offer high quality business IT service, combining expertise and great customer service but without the…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Microbyte MSPmicrobyte.comHQ: Peterborough, United KingdomReported employees: 11-50 | Peterborough, United Kingdom | 11-50 | Exact match | 38 contacts → |
“If you're running a business, the last thing you need is slow, unreliable IT creating expensive problems.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Azets Technology Solutionsazets.co.ukHQ: Aldridge, United KingdomReported employees: 11-50 | Aldridge, United Kingdom | 11-50 | Exact match | 37 contacts → |
“Azets Technology Solutions supply a range of IT services and computer solutions which are designed to meet the needs of the SME, the IT support and services that Azets offer meet…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Acronymsacronyms.co.ukHQ: Plymouth, United KingdomReported employees: 11-50 | Plymouth, United Kingdom | 11-50 | Exact match | 35 contacts → |
“Acronyms is an IT support company offering a range of IT services, designed to save organisations time that they can spend on growing their own businesses.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Cheeky Munkey LTDcheekymunkey.co.ukHQ: St. Albans, United KingdomReported employees: 11-50 | St. Albans, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Cheeky Munkey is a privately owned and managed IT support company based in St Albans, Hertfordshire, providing professional IT support within London and the South East.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Impact IT Solutions UK LTDimpactitsolutions.comHQ: Whitchurch, United KingdomReported employees: 11-50 | Whitchurch, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Bristol's leading IT Support Provider, offering tailored IT solutions to meet your needs.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Go-To Outsourcinggo-to-outsourcing.com HQ: Bromsgrove, United KingdomReported employees: 11-50 | Bromsgrove, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Connect Systems LTDconnectsys.co.ukHQ: Chesham, United KingdomReported employees: 11-50 | Chesham, United Kingdom | 11-50 | Exact match | 31 contacts → |
“Connect Systems are based in Chesham Bucks and were established in 1992 to provide professional IT services to the SMB market place.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 779 company matches
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System administration outsourcing firms: dataset insights
September 6, 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
773 records in the displayed employee bands.
6 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 on this list were verified
Email last verified
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.
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 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 ↗
System administration outsourcing firms by metro
Questions about this company list
What does Exact match mean for system administration outsourcing 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 system administration outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 779 matching company records, 6,627 tracked contacts and 2,999 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 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
System administration outsourcing firms by geography
- System administration outsourcing firms based in the United States
- System administration outsourcing firms based in Brazil
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
- System administration outsourcing firms based in Australia
- System administration outsourcing firms based in the Netherlands
- System administration outsourcing firms based in Spain
- System administration outsourcing firms based in Italy
- System administration outsourcing firms based in South Africa
- System administration outsourcing firms based in Poland
- System administration outsourcing firms based in Belgium
Cite this list
RevenueBase Data Team. Top 25 system administration outsourcing firms based in the United Kingdom. Snapshot: September 6, 2026. https://revenuebase.ai/companies/system-administration-outsourcing-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
- All company lists
- Lists by location
- Lists A-Z
- New lists
- System administration outsourcing firms based in the United States
- System administration outsourcing firms based in Brazil
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
- System administration outsourcing firms based in Australia
Company intelligence · public preview
Top 25 system administration outsourcing firms based in the United Kingdom
RevenueBase records 779 matching company records for system administration outsourcing firms based in the United Kingdom, with 6,627 tracked contacts and 2,999 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 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 25 system administration outsourcing 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 | 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 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Deepscale Technologies LTDdeep-scale.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 141 contacts → |
“Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Ramsacramsac.com HQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 93 contacts → |
“ramsac provide so much more than just IT support.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Bluesourcebluesource.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 92 contacts → |
“The costs for shifting to the cloud and juggling a hybrid environment continue to escalate due to rising support fees and expensive tech resources.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | CSTcst.co.uk HQ: Wooburn Green, United KingdomReported employees: 51-200 | Wooburn Green, United Kingdom | 51-200 | Exact match | 76 contacts → |
“CST is an I.T.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | ADM Computingadm-computing.co.uk HQ: Canterbury, United KingdomReported employees: 51-200 | Canterbury, United Kingdom | 51-200 | Exact match | 72 contacts → |
“ADM Computing is an independent, family-owned IT services provider headquartered in Canterbury, supporting organisations across Kent, London and the South East since 1984.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | 3gi Technology3gi.co.uk HQ: Brentwood, United KingdomReported employees: 11-50 | Brentwood, United Kingdom | 11-50 | Exact match | 67 contacts → |
“3Gi Technology is a global IT Managed Service Provider (MSP) offering enterprise level IT Professional Services to numerous companies all over the world.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | CMInewcmi.com HQ: Belfast, United KingdomReported employees: 51-200 | Belfast, United Kingdom | 51-200 | Exact match | 66 contacts → |
“We create, design, deliver and support informed & intelligent strategies to navigate shifting technology, keeping organisations like yours effective & secure.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Layers Logic IT Limitedlayerslogic.com HQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 63 contacts → |
“Empowering Global Business with Seamless IT Excellence At Layers Logic IT Limited, we don’t just provide tech support-we build the digital backbone for global enterprises.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Alternit ONEalternitone.com HQ: Fenchurch Street, United KingdomReported employees: 11-50 | Fenchurch Street, United Kingdom | 11-50 | Exact match | 54 contacts → |
“We are an outsourced IT Services Provider, who specialise in delivering high quality end user support, and the design build and run of IT Infrastructure to the Alternative…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | BSL ITbsl-it.com HQ: Finedon, United KingdomReported employees: 11-50 | Finedon, United Kingdom | 11-50 | Exact match | 50 contacts → |
“BSL, your personal IT partner.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Concorde Technology Grouptctg.co.uk HQ: Ossett, United KingdomReported employees: 51-200 | Ossett, United Kingdom | 51-200 | Exact match | 49 contacts → |
“Concorde Technology Group is one of the UK’s leading Managed IT Services providers, specialising in Infrastructure Solutions, IT support, Cybersecurity, Communications and Cloud…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | RTSrtsl.net HQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 41 contacts → |
“RTS is a leading UK-based IT service provider, specialising in distributed networks, hosting services, and infrastructure consulting for medium to large enterprises.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Select Technologyselect-technology.co.uk HQ: Paddock Wood, United KingdomReported employees: 11-50 | Paddock Wood, United Kingdom | 11-50 | Exact match | 40 contacts → |
“Select Technology is one of the South East’s leading technology service providers, with 30 years of expertise in designing, implementing and supporting IT networks of all sizes.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Phoenix47phoenix47.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 40 contacts → |
“Phoenix47 is an IT infrastructure services company providing Support Desk, Managed Services and Professional Services.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Holker ITholkerit.co.uk HQ: Burnley, United KingdomReported employees: 11-50 | Burnley, United Kingdom | 11-50 | Exact match | 39 contacts → |
“At Holker IT our aim is to improve our clients’ businesses through strategic advice, implementation and on-going support of IT systems and processes, from single to multi-server…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Convene IT LTDconveneit.co.uk HQ: Chorley, United KingdomReported employees: 11-50 | Chorley, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Convene IT Ltd With over 15 years of experience in IT support services We we offer high quality business IT service, combining expertise and great customer service but without the…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Microbyte MSPmicrobyte.com HQ: Peterborough, United KingdomReported employees: 11-50 | Peterborough, United Kingdom | 11-50 | Exact match | 38 contacts → |
“If you're running a business, the last thing you need is slow, unreliable IT creating expensive problems.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Azets Technology Solutionsazets.co.uk HQ: Aldridge, United KingdomReported employees: 11-50 | Aldridge, United Kingdom | 11-50 | Exact match | 37 contacts → |
“Azets Technology Solutions supply a range of IT services and computer solutions which are designed to meet the needs of the SME, the IT support and services that Azets offer meet…” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Acronymsacronyms.co.uk HQ: Plymouth, United KingdomReported employees: 11-50 | Plymouth, United Kingdom | 11-50 | Exact match | 35 contacts → |
“Acronyms is an IT support company offering a range of IT services, designed to save organisations time that they can spend on growing their own businesses.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Cheeky Munkey LTDcheekymunkey.co.uk HQ: St. Albans, United KingdomReported employees: 11-50 | St. Albans, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Cheeky Munkey is a privately owned and managed IT support company based in St Albans, Hertfordshire, providing professional IT support within London and the South East.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Impact IT Solutions UK LTDimpactitsolutions.com HQ: Whitchurch, United KingdomReported employees: 11-50 | Whitchurch, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Bristol's leading IT Support Provider, offering tailored IT solutions to meet your needs.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Go-To Outsourcinggo-to-outsourcing.com HQ: Bromsgrove, United KingdomReported employees: 11-50 | Bromsgrove, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Connect Systems LTDconnectsys.co.uk HQ: Chesham, United KingdomReported employees: 11-50 | Chesham, United Kingdom | 11-50 | Exact match | 31 contacts → |
“Connect Systems are based in Chesham Bucks and were established in 1992 to provide professional IT services to the SMB market place.” Recorded description excerpt · September 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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System administration outsourcing firms: dataset insights
September 6, 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
773 records in the displayed employee bands.
6 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 on this list were verified
Email last verified
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.
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 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 ↗
System administration outsourcing firms by metro
Questions about this company list
What does Exact match mean for system administration outsourcing 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 system administration outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 779 matching company records, 6,627 tracked contacts and 2,999 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 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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Cite this list
RevenueBase Data Team. Top 25 system administration outsourcing firms based in the United Kingdom. Snapshot: September 6, 2026. https://revenuebase.ai/companies/system-administration-outsourcing-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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