Company lists · Data refreshed September 2026
Top 25 System administration outsourcing firms based in London, United Kingdom
RevenueBase identified 78 company matches for system administration outsourcing firms associated with London, United Kingdom as of September 2026 and tracks 621 professional contacts across them, including 114 with verified work emails and 16 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.
This list covers company matches for system administration outsourcing firms associated with London, 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 13, 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 London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 13, 2026 · View company records in RevenueBase | |||||
| 2 | 28 contacts → | ||||
Exact match “We managed IT Infrastructures with dedicated Team of vibrant young Professionals.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 3 | 26 contacts → | ||||
Exact match “As a managed services provider in the South East Nutbourne was founded to support people and solve their problems, offering a service that can cover all of your business’ needs…” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 4 | 19 contacts → | ||||
Exact match “Labyrinth Technology has been supporting law firms across the UK for over 20 years.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 5 | 19 contacts → | ||||
Exact match “Network Integrators, We are well-versed in a variety of operating systems, networks, and databases.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 6 | 14 contacts → | ||||
Exact match “We provide award winning telephone, remote and scheduled onsite IT Support Services & IT Solutions to organisations with between 10-300 staff members.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 7 | 12 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 8 | 10 contacts → | ||||
Exact match “1st IT is an IT company based in London that has experience in supporting businesses of all shapes and sizes with IT services nationwide.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 9 | 9 contacts → | ||||
Exact match “Since 2004 we have been a leading IT support specialist.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 10 | 7 contacts → | ||||
Exact match “ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 11 | 7 contacts → | ||||
Exact match “Information Technology Consultancy and Support.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 12 | 7 contacts → | ||||
Exact match “New Era IT provides reliable, professional, and impactful IT solutions for businesses worldwide.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 13 | 7 contacts → | ||||
Exact match “Spectrum Networks Solutions Ltd was established in with the sole purpose of providing jargon-free IT Support.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 14 | 6 contacts → | ||||
Exact match “North London IT Support provides friendly, dependable IT support and cybersecurity services to SMEs across North London and beyond.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 15 | 6 contacts → | ||||
Exact match “ITGUYS is a managed IT services company dedicated to providing sustainable, hassle-free IT support.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 16 | 5 contacts → | ||||
Exact match “INK Networks are a London based managed services company with a nationwide presence and are unique in our approach as we are solely owned, run and managed by senior technical…” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 17 | 5 contacts → | ||||
Exact match “Proactive Networking was born in 2003 to provide a personal and integrated level of IT to small and medium businesses, we have created a unique IT outsourcing model.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 18 | 5 contacts → | ||||
Exact match “Qualinet Solutions Limited (now QNS LLP), began in March of 2003.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 19 | 5 contacts → | ||||
Exact match “We provide bespoke Technology Support services to SME's in the London Area.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 20 | 4 contacts → | ||||
Exact match “HelpDesk Heroes IT Company London.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 21 | 4 contacts → | ||||
Exact match “With over 30+ years of experience and knowledge in the Technology and Business industry, we have become known for managing our tailored managed IT services.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “We know running a business is hard enough without worrying about cyber threats and IT headaches.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 23 | 3 contacts → | ||||
Exact match “IT Infrastructure Specialists We are a team of IT professionals with a wealth of experience across multiple disciplines.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 24 | 3 contacts → | ||||
Exact match “Vitalytics is a managed services provider delivering enterprise-grade IT solutions to growing businesses across the UK, US, Europe, and beyond.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “Professional System Administration and DevOps support for remote customers.” Recorded in the RevenueBase company graph · Sep 13, 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 78 system administration outsourcing firms based in London, United Kingdom
See the full list, filter by size, metro and specialty, and access 114 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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System administration outsourcing firms based in London, United Kingdom at a glance
As of Sep 13, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 15.0dCompany record updated
Median 79.0dHow 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 London, 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 114 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 13, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “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 London, United Kingdom?
RevenueBase identified 78 company matches for system administration outsourcing firms associated with London, 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?
Deepscale Technologies LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United Kingdom has the most system administration outsourcing firms?
London leads the United Kingdom 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 114 professional contacts with verified work emails tracked across these 78 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 13, 2026.
Ready to reach these companies? Verified emails and direct dials for all 78 system administration outsourcing firms based in London, 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 the United Kingdom
- 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
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 the United Kingdom
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
Company intelligence · public preview
Top 25 system administration outsourcing firms based in London, 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 78 matching company records for system administration outsourcing firms based in London, United Kingdom, with 621 tracked contacts and 114 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 13, 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 London, 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 |  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 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Brilliant Computers Citadel And Information Technologybrilliantccit.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 28 contacts → |
“We managed IT Infrastructures with dedicated Team of vibrant young Professionals.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Nutbourne LTDnutbourne.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“As a managed services provider in the South East Nutbourne was founded to support people and solve their problems, offering a service that can cover all of your business’ needs…” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Labyrinth Technology LTDlabyrinthit.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Labyrinth Technology has been supporting law firms across the UK for over 20 years.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Network Integrators LTDnetworkintegrators.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Network Integrators, We are well-versed in a variety of operating systems, networks, and databases.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  OUR IT Department LTDouritdept.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 14 contacts → |
“We provide award winning telephone, remote and scheduled onsite IT Support Services & IT Solutions to organisations with between 10-300 staff members.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Ec-Msp LTDecmsp.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 12 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 |  1st IT1st-it.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“1st IT is an IT company based in London that has experience in supporting businesses of all shapes and sizes with IT services nationwide.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Help4it LTDhelp4it.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Since 2004 we have been a leading IT support specialist.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  ISUMOisumo.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 7 contacts → |
“ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Iternity Limitediternity.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Information Technology Consultancy and Support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  NEW ERA ITnewerait.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“New Era IT provides reliable, professional, and impactful IT solutions for businesses worldwide.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Spectrum Networks Solutions LTDspectrumweb.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Spectrum Networks Solutions Ltd was established in with the sole purpose of providing jargon-free IT Support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  North London IT Supportnorthlondonitsupport.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“North London IT Support provides friendly, dependable IT support and cybersecurity services to SMEs across North London and beyond.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Itguys Certified B Corpitguys.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“ITGUYS is a managed IT services company dedicated to providing sustainable, hassle-free IT support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  INK Networksinknetworks.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“INK Networks are a London based managed services company with a nationwide presence and are unique in our approach as we are solely owned, run and managed by senior technical…” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Proactive Networkingproactive-networking.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Proactive Networking was born in 2003 to provide a personal and integrated level of IT to small and medium businesses, we have created a unique IT outsourcing model.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Qualinet Solutions LTDqns.itHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 5 contacts → |
“Qualinet Solutions Limited (now QNS LLP), began in March of 2003.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  UA Technology Servicesuatechserv.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“We provide bespoke Technology Support services to SME's in the London Area.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Helpdesk Heroeshelpdeskheroes.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 4 contacts → |
“HelpDesk Heroes IT Company London.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Premier IT Solutionpremieritsolution.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“With over 30+ years of experience and knowledge in the Technology and Business industry, we have become known for managing our tailored managed IT services.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Burstfire Networks Limitedburstfire.netHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“We know running a business is hard enough without worrying about cyber threats and IT headaches.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Redeem Information Systemsredeem.londonHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“IT Infrastructure Specialists We are a team of IT professionals with a wealth of experience across multiple disciplines.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Vitalyticsvitalytics.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Vitalytics is a managed services provider delivering enterprise-grade IT solutions to growing businesses across the UK, US, Europe, and beyond.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Madtech Supportmadtechsupport.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Professional System Administration and DevOps support for remote customers.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 78 company matches
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System administration outsourcing firms: dataset insights
September 13, 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
78 records in the displayed employee bands.
0 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 15.0dCompany record updated
Median 79.0dHow 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 13, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for 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 London, United Kingdom?
The saved snapshot records 78 matching company records, 621 tracked contacts and 114 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 13, 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 the United Kingdom
- 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
Cite this list
RevenueBase Data Team. Top 25 system administration outsourcing firms based in London, United Kingdom. Snapshot: September 13, 2026. https://revenuebase.ai/companies/system-administration-outsourcing-firms/united-kingdom/london.
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 the United Kingdom
- System administration outsourcing firms based in France
- System administration outsourcing firms based in Germany
- System administration outsourcing firms based in Canada
Company intelligence · public preview
Top 25 system administration outsourcing firms based in London, United Kingdom
RevenueBase records 78 matching company records for system administration outsourcing firms based in London, United Kingdom, with 621 tracked contacts and 114 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 13, 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 London, 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 | 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 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Brilliant Computers Citadel And Information Technologybrilliantccit.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 28 contacts → |
“We managed IT Infrastructures with dedicated Team of vibrant young Professionals.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Nutbourne LTDnutbourne.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“As a managed services provider in the South East Nutbourne was founded to support people and solve their problems, offering a service that can cover all of your business’ needs…” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Labyrinth Technology LTDlabyrinthit.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Labyrinth Technology has been supporting law firms across the UK for over 20 years.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Network Integrators LTDnetworkintegrators.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Network Integrators, We are well-versed in a variety of operating systems, networks, and databases.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | OUR IT Department LTDouritdept.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 14 contacts → |
“We provide award winning telephone, remote and scheduled onsite IT Support Services & IT Solutions to organisations with between 10-300 staff members.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Ec-Msp LTDecmsp.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 12 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 | 1st IT1st-it.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“1st IT is an IT company based in London that has experience in supporting businesses of all shapes and sizes with IT services nationwide.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Help4it LTDhelp4it.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Since 2004 we have been a leading IT support specialist.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | ISUMOisumo.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 7 contacts → |
“ISUMO leverage industry leading technologies to ensure optimum security, availability and compliance throughout your entire network.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Iternity Limitediternity.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Information Technology Consultancy and Support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | NEW ERA ITnewerait.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“New Era IT provides reliable, professional, and impactful IT solutions for businesses worldwide.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Spectrum Networks Solutions LTDspectrumweb.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 7 contacts → |
“Spectrum Networks Solutions Ltd was established in with the sole purpose of providing jargon-free IT Support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | North London IT Supportnorthlondonitsupport.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“North London IT Support provides friendly, dependable IT support and cybersecurity services to SMEs across North London and beyond.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Itguys Certified B Corpitguys.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 6 contacts → |
“ITGUYS is a managed IT services company dedicated to providing sustainable, hassle-free IT support.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | INK Networksinknetworks.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“INK Networks are a London based managed services company with a nationwide presence and are unique in our approach as we are solely owned, run and managed by senior technical…” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Proactive Networkingproactive-networking.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Proactive Networking was born in 2003 to provide a personal and integrated level of IT to small and medium businesses, we have created a unique IT outsourcing model.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Qualinet Solutions LTDqns.it HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 5 contacts → |
“Qualinet Solutions Limited (now QNS LLP), began in March of 2003.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | UA Technology Servicesuatechserv.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“We provide bespoke Technology Support services to SME's in the London Area.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Helpdesk Heroeshelpdeskheroes.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 4 contacts → |
“HelpDesk Heroes IT Company London.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Premier IT Solutionpremieritsolution.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“With over 30+ years of experience and knowledge in the Technology and Business industry, we have become known for managing our tailored managed IT services.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Burstfire Networks Limitedburstfire.net HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“We know running a business is hard enough without worrying about cyber threats and IT headaches.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Redeem Information Systemsredeem.london HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“IT Infrastructure Specialists We are a team of IT professionals with a wealth of experience across multiple disciplines.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Vitalyticsvitalytics.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Vitalytics is a managed services provider delivering enterprise-grade IT solutions to growing businesses across the UK, US, Europe, and beyond.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Madtech Supportmadtechsupport.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Professional System Administration and DevOps support for remote customers.” Recorded description excerpt · September 13, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 78 company matches
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System administration outsourcing firms: dataset insights
September 13, 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
78 records in the displayed employee bands.
0 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 15.0dCompany record updated
Median 79.0dHow 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 13, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for 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 London, United Kingdom?
The saved snapshot records 78 matching company records, 621 tracked contacts and 114 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 13, 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
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Cite this list
RevenueBase Data Team. Top 25 system administration outsourcing firms based in London, United Kingdom. Snapshot: September 13, 2026. https://revenuebase.ai/companies/system-administration-outsourcing-firms/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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