Company lists · Data refreshed September 2026
Top 25 HR outsourcing firms based in the United Kingdom
RevenueBase identified 2,740 company matches for HR outsourcing firms associated with the United Kingdom as of September 2026 and tracks 60,239 professional contacts across them, including 15,427 with verified work emails and 3,412 with mobile numbers. London is the largest hub.
This list covers company matches for HR 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 30, 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 HR outsourcing firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 20,824 contacts → | ||||
Exact match “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 2 | 4,423 contacts → | ||||
Exact match “Robert Walters is the world’s most trusted talent solutions business.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 3 | 2,734 contacts → | ||||
Exact match “At Alight | NGA Human Resources our mission is to make HR work better.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 4 | 1,927 contacts → | ||||
Exact match “Avance Consulting is a global organization focused on delivering innovative talent solution services to some of the most renowned companies in the world, across industries that…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 5 | 1,465 contacts → | ||||
Exact match “Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 6 | 870 contacts → | ||||
Exact match “At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 7 | 532 contacts → | ||||
Exact match “We are a leading service provider of Human Capital Management (HCM) solutions across Europe, serving more than 1.5 million employees monthly with an annual revenue of 78 million…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 8 | 507 contacts → | ||||
Exact match “Established in 1983, Frontier Software is an acknowledged leader in the provision of a global HR & Payroll software solution.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 9 | 450 contacts → | ||||
Exact match “Page Executive is a global leader in executive search & recruitment.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 10 | 410 contacts → | ||||
Exact match “Interaction is one of the UK's fastest growing independent recruitment businesses, recognised and published as "UK's #1 General Recruiter".” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 11 | 400 contacts → | ||||
Exact match “Our award winning HR and health & safety services free you from workforce admin and help keep you on the right side of the law.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 12 | 333 contacts → | ||||
Exact match “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 13 | 311 contacts → | ||||
Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 14 | 291 contacts → | ||||
Exact match “Siamo Group is an award-winning company providing UK-wide personnel services, strategically combining a complete recruitment service with integrated training, HR, payroll and IT…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 15 | 289 contacts → | ||||
Exact match “Since our establishment in Huntress has been at the forefront of recruitment across a range of specialist sectors.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 16 | 219 contacts → | ||||
Exact match “We provide HR, payroll, benefits and learning solutions for UK organisations with employees.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 17 | 205 contacts → | ||||
Exact match “AdviserPlus is the UK’s leading provider of HR technology, consulting, and advisory services.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 18 | 200 contacts → | ||||
Exact match “Join Talent is a ‘talent acquisition as a service’ (TAaaS) business - dedicated to driving business scale up growth performance.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 19 | 190 contacts → | ||||
Exact match “Omni – Talent Is Everything At Omni, we help businesses find, attract, and retain the right people to drive long-term success.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 20 | 169 contacts → | ||||
Exact match “Welcome to The HR Dept.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 21 | 148 contacts → | ||||
Exact match “Proudly based in the North East, our multi award-winning Payroll & HR service has been delivering professional payroll and HR solutions for over 40 years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 22 | 137 contacts → | ||||
Exact match “iXceed Solutions is a global, end-to-end Talent Solutions, RPO, EOR, Enterprise Services, and Digital Transformation partner trusted by Fortune 100 and high-growth organizations…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 23 | 129 contacts → | ||||
Exact match “Overview LACE Partners is trusted advisors to HR and business leaders navigating complex workforce challenges.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 24 | 128 contacts → | ||||
Exact match “Newforce provides global recruitment and workforce staffing solutions that help organizations access skilled talent across multiple markets.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 25 | 124 contacts → | ||||
Exact match “Omnipresent was acquired by Deel in October of 2025.” Recorded in the RevenueBase company graph · Sep 30, 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 “HR 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 2,740 HR outsourcing firms based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 15,427 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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HR outsourcing firms based in the United Kingdom at a glance
As of Sep 30, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 32.0dCompany record updated
Median 96.0dHow this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “HR 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 15,427 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 30, 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.
HR 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 “HR outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many HR outsourcing firms are there based in the United Kingdom?
RevenueBase identified 2,740 company matches for HR 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?
Capita tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most HR outsourcing firms?
London leads with 759 company records, followed by Manchester (75) and Leeds (42).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 15,427 professional contacts with verified work emails tracked across these 2,740 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 30, 2026.
Ready to reach these companies? Verified emails and direct dials for all 2,740 HR outsourcing firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
HR outsourcing firms by geography
- HR outsourcing firms based in the United States
- HR outsourcing firms based in Brazil
- HR outsourcing firms based in France
- HR outsourcing firms based in Canada
- HR outsourcing firms based in Mexico
- HR outsourcing firms based in the Netherlands
- HR outsourcing firms based in Germany
- HR outsourcing firms based in Argentina
- HR outsourcing firms based in Australia
- HR outsourcing firms based in Italy
- HR outsourcing firms based in South Africa
- HR outsourcing firms based in Spain
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 HR 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 2,740 matching company records for HR outsourcing firms based in the United Kingdom, with 60,239 tracked contacts and 15,427 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 30, 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 HR 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 |  Capitacapita.comHQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 20,824 contacts → |
“Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Robert Waltersrobertwalters.co.ukHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 4,423 contacts → |
“Robert Walters is the world’s most trusted talent solutions business.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,734 contacts → |
“At Alight | NGA Human Resources our mission is to make HR work better.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Avance Consultingavanceservices.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 1,927 contacts → |
“Avance Consulting is a global organization focused on delivering innovative talent solution services to some of the most renowned companies in the world, across industries that…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Zelliszellis.comHQ: Bristol, United KingdomReported employees: 1,001-5,000 | Bristol, United Kingdom | 1,001-5,000 | Exact match | 1,465 contacts → |
“Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Oliver Jamesoliverjames.comHQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 870 contacts → |
“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  ROCzalaris.comHQ: Weybridge, United KingdomReported employees: 501-1,000 | Weybridge, United Kingdom | 501-1,000 | Exact match | 532 contacts → |
“We are a leading service provider of Human Capital Management (HCM) solutions across Europe, serving more than 1.5 million employees monthly with an annual revenue of 78 million…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Frontier Softwarefrontiersoftware.comHQ: Lightwater, United KingdomReported employees: 201-500 | Lightwater, United Kingdom | 201-500 | Exact match | 507 contacts → |
“Established in 1983, Frontier Software is an acknowledged leader in the provision of a global HR & Payroll software solution.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Page Executivepageexecutive.comHQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 450 contacts → |
“Page Executive is a global leader in executive search & recruitment.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Interaction Recruitmentinteractionrecruitment.co.ukHQ: Huntingdon, United KingdomReported employees: 201-500 | Huntingdon, United Kingdom | 201-500 | Exact match | 410 contacts → |
“Interaction is one of the UK's fastest growing independent recruitment businesses, recognised and published as "UK's #1 General Recruiter".” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Cronercroner.co.ukHQ: Wheatfield Way, United KingdomReported employees: 201-500 | Wheatfield Way, United Kingdom | 201-500 | Exact match | 400 contacts → |
“Our award winning HR and health & safety services free you from workforce admin and help keep you on the right side of the law.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Ubique Systemsubique-systems.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 333 contacts → |
“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  GI Outsourcinggioutsourcing.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 311 contacts → |
“GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Siamo Groupsiamogroup.comHQ: Birmingham, United KingdomReported employees: 51-200 | Birmingham, United Kingdom | 51-200 | Exact match | 291 contacts → |
“Siamo Group is an award-winning company providing UK-wide personnel services, strategically combining a complete recruitment service with integrated training, HR, payroll and IT…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Huntresshuntress.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 289 contacts → |
“Since our establishment in Huntress has been at the forefront of recruitment across a range of specialist sectors.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  CIPHRciphr.comHQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 219 contacts → |
“We provide HR, payroll, benefits and learning solutions for UK organisations with employees.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Adviserplusadviserplus.comHQ: Ellesmere Port, United KingdomReported employees: 201-500 | Ellesmere Port, United Kingdom | 201-500 | Exact match | 205 contacts → |
“AdviserPlus is the UK’s leading provider of HR technology, consulting, and advisory services.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Join Talentjointalent.netHQ: Brechin, United KingdomReported employees: 201-500 | Brechin, United Kingdom | 201-500 | Exact match | 200 contacts → |
“Join Talent is a ‘talent acquisition as a service’ (TAaaS) business - dedicated to driving business scale up growth performance.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Omni RMSomnirms.comHQ: Altrincham, United KingdomReported employees: 51-200 | Altrincham, United Kingdom | 51-200 | Exact match | 190 contacts → |
“Omni – Talent Is Everything At Omni, we help businesses find, attract, and retain the right people to drive long-term success.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  The HR Depthrdept.co.ukHQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 169 contacts → |
“Welcome to The HR Dept.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Cintra HR & Payroll Servicescintra.co.ukHQ: Newcastle Upon Tyne, United KingdomReported employees: 51-200 | Newcastle Upon Tyne, United Kingdom | 51-200 | Exact match | 148 contacts → |
“Proudly based in the North East, our multi award-winning Payroll & HR service has been delivering professional payroll and HR solutions for over 40 years.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Ixceed Solutionsixceed-solutions.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 137 contacts → |
“iXceed Solutions is a global, end-to-end Talent Solutions, RPO, EOR, Enterprise Services, and Digital Transformation partner trusted by Fortune 100 and high-growth organizations…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Lace Partnerslacepartners.comHQ: South Bank, United KingdomReported employees: 51-200 | South Bank, United Kingdom | 51-200 | Exact match | 129 contacts → |
“Overview LACE Partners is trusted advisors to HR and business leaders navigating complex workforce challenges.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Newforce Global Servicesnewforceltd.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 128 contacts → |
“Newforce provides global recruitment and workforce staffing solutions that help organizations access skilled talent across multiple markets.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Omnipresentdeel.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 124 contacts → |
“Omnipresent was acquired by Deel in October of 2025.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 2,740 company matches
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HR outsourcing firms: dataset insights
September 30, 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
2,728 records in the displayed employee bands.
12 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 32.0dCompany record updated
Median 96.0dHow 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 30, 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 ↗
HR outsourcing firms by metro
Questions about this company list
What does Exact match mean for HR 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 HR outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 2,740 matching company records, 60,239 tracked contacts and 15,427 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 30, 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
HR outsourcing firms by geography
- HR outsourcing firms based in the United States
- HR outsourcing firms based in Brazil
- HR outsourcing firms based in France
- HR outsourcing firms based in Canada
- HR outsourcing firms based in Mexico
- HR outsourcing firms based in the Netherlands
- HR outsourcing firms based in Germany
- HR outsourcing firms based in Argentina
- HR outsourcing firms based in Australia
- HR outsourcing firms based in Italy
- HR outsourcing firms based in South Africa
- HR outsourcing firms based in Spain
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 HR outsourcing firms based in the United Kingdom. Snapshot: September 30, 2026. https://revenuebase.ai/companies/hr-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
Company intelligence · public preview
Top 25 HR outsourcing firms based in the United Kingdom
RevenueBase records 2,740 matching company records for HR outsourcing firms based in the United Kingdom, with 60,239 tracked contacts and 15,427 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 30, 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 HR 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 | Capitacapita.com HQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 20,824 contacts → |
“Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Robert Waltersrobertwalters.co.uk HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 4,423 contacts → |
“Robert Walters is the world’s most trusted talent solutions business.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,734 contacts → |
“At Alight | NGA Human Resources our mission is to make HR work better.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Avance Consultingavanceservices.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 1,927 contacts → |
“Avance Consulting is a global organization focused on delivering innovative talent solution services to some of the most renowned companies in the world, across industries that…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Zelliszellis.com HQ: Bristol, United KingdomReported employees: 1,001-5,000 | Bristol, United Kingdom | 1,001-5,000 | Exact match | 1,465 contacts → |
“Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Oliver Jamesoliverjames.com HQ: Manchester, United KingdomReported employees: 501-1,000 | Manchester, United Kingdom | 501-1,000 | Exact match | 870 contacts → |
“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | ROCzalaris.com HQ: Weybridge, United KingdomReported employees: 501-1,000 | Weybridge, United Kingdom | 501-1,000 | Exact match | 532 contacts → |
“We are a leading service provider of Human Capital Management (HCM) solutions across Europe, serving more than 1.5 million employees monthly with an annual revenue of 78 million…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Frontier Softwarefrontiersoftware.com HQ: Lightwater, United KingdomReported employees: 201-500 | Lightwater, United Kingdom | 201-500 | Exact match | 507 contacts → |
“Established in 1983, Frontier Software is an acknowledged leader in the provision of a global HR & Payroll software solution.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Page Executivepageexecutive.com HQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 450 contacts → |
“Page Executive is a global leader in executive search & recruitment.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Interaction Recruitmentinteractionrecruitment.co.uk HQ: Huntingdon, United KingdomReported employees: 201-500 | Huntingdon, United Kingdom | 201-500 | Exact match | 410 contacts → |
“Interaction is one of the UK's fastest growing independent recruitment businesses, recognised and published as "UK's #1 General Recruiter".” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cronercroner.co.uk HQ: Wheatfield Way, United KingdomReported employees: 201-500 | Wheatfield Way, United Kingdom | 201-500 | Exact match | 400 contacts → |
“Our award winning HR and health & safety services free you from workforce admin and help keep you on the right side of the law.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Ubique Systemsubique-systems.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 333 contacts → |
“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | GI Outsourcinggioutsourcing.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 311 contacts → |
“GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Siamo Groupsiamogroup.com HQ: Birmingham, United KingdomReported employees: 51-200 | Birmingham, United Kingdom | 51-200 | Exact match | 291 contacts → |
“Siamo Group is an award-winning company providing UK-wide personnel services, strategically combining a complete recruitment service with integrated training, HR, payroll and IT…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Huntresshuntress.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 289 contacts → |
“Since our establishment in Huntress has been at the forefront of recruitment across a range of specialist sectors.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | CIPHRciphr.com HQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 219 contacts → |
“We provide HR, payroll, benefits and learning solutions for UK organisations with employees.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Adviserplusadviserplus.com HQ: Ellesmere Port, United KingdomReported employees: 201-500 | Ellesmere Port, United Kingdom | 201-500 | Exact match | 205 contacts → |
“AdviserPlus is the UK’s leading provider of HR technology, consulting, and advisory services.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Join Talentjointalent.net HQ: Brechin, United KingdomReported employees: 201-500 | Brechin, United Kingdom | 201-500 | Exact match | 200 contacts → |
“Join Talent is a ‘talent acquisition as a service’ (TAaaS) business - dedicated to driving business scale up growth performance.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Omni RMSomnirms.com HQ: Altrincham, United KingdomReported employees: 51-200 | Altrincham, United Kingdom | 51-200 | Exact match | 190 contacts → |
“Omni – Talent Is Everything At Omni, we help businesses find, attract, and retain the right people to drive long-term success.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | The HR Depthrdept.co.uk HQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 169 contacts → |
“Welcome to The HR Dept.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Cintra HR & Payroll Servicescintra.co.uk HQ: Newcastle Upon Tyne, United KingdomReported employees: 51-200 | Newcastle Upon Tyne, United Kingdom | 51-200 | Exact match | 148 contacts → |
“Proudly based in the North East, our multi award-winning Payroll & HR service has been delivering professional payroll and HR solutions for over 40 years.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Ixceed Solutionsixceed-solutions.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 137 contacts → |
“iXceed Solutions is a global, end-to-end Talent Solutions, RPO, EOR, Enterprise Services, and Digital Transformation partner trusted by Fortune 100 and high-growth organizations…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Lace Partnerslacepartners.com HQ: South Bank, United KingdomReported employees: 51-200 | South Bank, United Kingdom | 51-200 | Exact match | 129 contacts → |
“Overview LACE Partners is trusted advisors to HR and business leaders navigating complex workforce challenges.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Newforce Global Servicesnewforceltd.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 128 contacts → |
“Newforce provides global recruitment and workforce staffing solutions that help organizations access skilled talent across multiple markets.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Omnipresentdeel.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 124 contacts → |
“Omnipresent was acquired by Deel in October of 2025.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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HR outsourcing firms: dataset insights
September 30, 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
2,728 records in the displayed employee bands.
12 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 32.0dCompany record updated
Median 96.0dHow 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 30, 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 ↗
HR outsourcing firms by metro
Questions about this company list
What does Exact match mean for HR 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 HR outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 2,740 matching company records, 60,239 tracked contacts and 15,427 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 30, 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
HR outsourcing firms by geography
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- HR outsourcing firms based in France
- HR outsourcing firms based in Canada
- HR outsourcing firms based in Mexico
- HR outsourcing firms based in the Netherlands
- HR outsourcing firms based in Germany
- HR outsourcing firms based in Argentina
- HR outsourcing firms based in Australia
- HR outsourcing firms based in Italy
- HR outsourcing firms based in South Africa
- HR outsourcing firms based in Spain
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 HR outsourcing firms based in the United Kingdom. Snapshot: September 30, 2026. https://revenuebase.ai/companies/hr-outsourcing-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗