Company lists · Data refreshed September 2026

Top 22 HR outsourcing companies based in the United Kingdom

Name: HR outsourcing companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 2,192 companies tracked

RevenueBase identified 2,192 company matches for HR outsourcing companies associated with the United Kingdom as of September 2026 and tracks 112,030 professional contacts across them, including 36,042 with verified work emails and 22,298 with mobile numbers. London is the largest hub.

This list covers company matches for HR outsourcing companies 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 3, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 3, 2026 How this list was built

2,192Companies

112,030Contacts tracked

36,042Verified emails

22,298Mobile numbers

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The 22 largest HR outsourcing companies based in the United Kingdom

Ranked by team size

Top 22 of 2,192 company matches for HR outsourcing companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 3, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	NGA Human Resources, An Alight Company	Exact match	London, United KingdomHQ recorded Sep 3, 2026	1,001-5,000	2,730 contacts →
	Exact match “At Alight \| NGA Human Resources our mission is to make HR work better.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
2	Zellis	Exact match	Bristol, United KingdomHQ recorded Sep 3, 2026	1,001-5,000	1,457 contacts →
	Exact match “Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
3	ROC	Exact match	Weybridge, United KingdomHQ recorded Sep 3, 2026	501-1,000	530 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 3, 2026 · View company records in RevenueBase
4	Interaction Recruitment	Exact match	Huntingdon, United KingdomHQ recorded Sep 3, 2026	201-500	408 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 3, 2026 · View company records in RevenueBase
5	Croner	Exact match	Hinckley, United KingdomHQ recorded Sep 3, 2026	201-500	399 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 3, 2026 · View company records in RevenueBase
6	Moorepay	Exact match	Swinton, United KingdomHQ recorded Sep 3, 2026	501-1,000	359 contacts →
	Exact match “Moorepay delivers expert HR and payroll solutions trusted by SMEs across the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
7	GI Outsourcing	Exact match	London, United KingdomHQ recorded Sep 3, 2026	201-500	317 contacts →
	Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
8	Project People	Exact match	Bristol, United KingdomHQ recorded Sep 3, 2026	201-500	277 contacts →
	Exact match “Project People provides complete talent acquisition and management solutions at a global level whilst maintaining a flexible and localised approach.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
9	CIPHR	Exact match	Reading, United KingdomHQ recorded Sep 3, 2026	201-500	220 contacts →
	Exact match “We provide HR, payroll, benefits and learning solutions for UK organisations with employees.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
10	Adviserplus	Exact match	Ellesmere Port, United KingdomHQ recorded Sep 3, 2026	201-500	207 contacts →
	Exact match “AdviserPlus is the UK’s leading provider of HR technology, consulting, and advisory services.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
11	Talent Solutions UK	Exact match	United KingdomHQ recorded Sep 3, 2026	1,001-5,000	121 contacts →
	Exact match “Talent Solutions combines ManpowerGroup's leading global offerings RPO, TAPFIN-MSP and Right Management to provide end-to-end, data-driven capabilities across the talent lifecycle.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
12	Randstad UK	Exact match	Luton, United KingdomHQ recorded Sep 3, 2026	1,001-5,000	56 contacts →
	Exact match “Randstad is the world's largest HR services provider and is driven to become the world's most valued 'working life partner', supporting people all over the world to find their…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
13	Warriorz Technologies	Exact match	London, United KingdomHQ recorded Sep 3, 2026	201-500	51 contacts →
	Exact match “In a highly technical industry of Information Technology, Warriorz Technologies Ltd is paving the way in Human Resource and Software consulting across the globe.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
14	Safe Computing	Exact match	Leicester, United KingdomHQ recorded Sep 3, 2026	201-500	45 contacts →
	Exact match “Safe Computing, now part of Access Group is a vibrant Leicester-based software & services company.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
15	Aviserv	Exact match	London, United KingdomHQ recorded Sep 3, 2026	201-500	40 contacts →
	Exact match “We help multi-national and SME's to help manage their complex staff and human resource needs in some of the most challenging environment such as Airports and Hospitals.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
16	Genius Consultants LTD	Exact match	Manchester, United KingdomHQ recorded Sep 3, 2026	201-500	33 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
17	Verto HR	Exact match	London, United KingdomHQ recorded Sep 3, 2026	201-500	31 contacts →
	Exact match “Verto HR, professional in-house HR experts, jointly managing your external on-site property staff.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
18	Access Peoplehr	Exact match	Loughborough, United KingdomHQ recorded Sep 3, 2026	201-500	17 contacts →
	Exact match “Access PeopleHR is part of The Access Group, and together we are supporting the world of HR.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
19	Alexander Mann Solutions	Exact match	Leeds, United KingdomHQ recorded Sep 3, 2026	n/a	10 contacts →
	Exact match “Alexander Mann Solutions is the world’s leading provider of talent acquisition and management services.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
20	Enterprise Personnel LTD	Exact match	Biggleswade, United KingdomHQ recorded Sep 3, 2026	201-500	9 contacts →
	Exact match “Enterprise Personnel is a vibrant, experienced recruitment organisation with a refreshing outlook and approach to both the needs of its clients and candidates.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
21	Gattaca Solutions	Exact match	Whiteley, United KingdomHQ recorded Sep 3, 2026	501-1,000	7 contacts →
	Exact match “Gattaca Solutions is a specialist provider of outsourced recruitment solutions to the engineering and technology industries.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
22	DHI Newforce	Exact match	London, United KingdomHQ recorded Sep 3, 2026	201-500	7 contacts →
	Exact match “Founded Since its foundation in 2015, team Dhi Newforce has always looked forward to exceeding the candidate's expectations.” Recorded in the RevenueBase company graph · Sep 3, 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 companies”. 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 22 of 2,192 HR outsourcing companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 36,042 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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HR outsourcing companies based in the United Kingdom at a glance

As of Sep 3, 2026

32.2%Verified-email coverage

19.9%Mobile-number coverage

51.1Average contacts per company

1-10Median size (employees)

26.0%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

1,627

11-50

356

51-200

104

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

3,92131–60

20,20461–90

11,52390–180

394180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “HR outsourcing companies” 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 36,042 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 3, 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 companies 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 companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many HR outsourcing companies are there based in the United Kingdom?

RevenueBase identified 2,192 company matches for HR outsourcing companies 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?

NGA Human Resources, An Alight Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most HR outsourcing companies?

London leads with 570 company records, followed by Manchester (56) and Bristol (40).

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 36,042 professional contacts with verified work emails tracked across these 2,192 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 3, 2026.

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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.