Company lists · Data refreshed September 2026

Top 25 HR business process outsourcing firms based in the United Kingdom

RevenueBase identified 2,294 company matches for HR business process outsourcing firms associated with the United Kingdom as of September 2026 and tracks 46,719 professional contacts across them, including 12,820 with verified work emails and 2,374 with mobile numbers. London is the largest hub.

This list covers company matches for HR business process 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 30, 2026 How this list was built
2,294Companies
46,719Contacts tracked
12,820Verified emails
2,374Mobile numbers
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The 25 largest HR business process outsourcing firms based in the United Kingdom

Ranked by team size
Top 25 of 2,294 company matches for HR business process outsourcing firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 30, 202610001+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
2Exact matchLondon, United KingdomHQ recorded Sep 30, 20261,001-5,0003,115 contacts →

Exact match

“QX Global Group is a sector‑led, technology‑enabled Business Process Management partner serving mid‑market organizations across the US, UK, and Ireland.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 30, 20261,001-5,0002,734 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
4Exact matchBristol, United KingdomHQ recorded Sep 30, 20261,001-5,0001,465 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
5Exact matchManchester, United KingdomHQ recorded Sep 30, 2026501-1,000870 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
6Exact matchWeybridge, United KingdomHQ recorded Sep 30, 2026501-1,000532 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
7Exact matchLightwater, United KingdomHQ recorded Sep 30, 2026201-500507 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
8Exact matchLondon, United KingdomHQ recorded Sep 30, 20261,001-5,000406 contacts →

Exact match

“In 2004, Sensée was founded on a simple principle: bring work to people, not people to work.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9Exact matchWheatfield Way, United KingdomHQ recorded Sep 30, 2026201-500400 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
10Exact matchLondon, United KingdomHQ recorded Sep 30, 2026501-1,000333 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
11Exact matchLondon, United KingdomHQ recorded Sep 30, 202651-200313 contacts →

Exact match

“With over 30 years of experience servicing blue-chip clients, Momenta Group is renowned for our expertise and quality-driven approach.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 30, 2026201-500311 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
13Exact matchLondon, United KingdomHQ recorded Sep 30, 202651-200289 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
14Exact matchReading, United KingdomHQ recorded Sep 30, 2026201-500219 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
15Exact matchEllesmere Port, United KingdomHQ recorded Sep 30, 2026201-500205 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
16Exact matchAltrincham, United KingdomHQ recorded Sep 30, 202651-200190 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
17Exact matchLondon, United KingdomHQ recorded Sep 30, 2026201-500150 contacts →

Exact match

“At Potentiam, we help businesses unlock growth by building nearshore and offshore teams that empower organisations to scale faster, operate smarter and stay ahead of the…”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 30, 202651-200148 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
19Exact matchMilton Keynes, United KingdomHQ recorded Sep 30, 202651-200146 contacts →

Exact match

“At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 30, 2026201-500137 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
21Exact matchSouth Bank, United KingdomHQ recorded Sep 30, 202651-200129 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
22Exact matchLondon, United KingdomHQ recorded Sep 30, 202651-200124 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
23Exact matchLondon, United KingdomHQ recorded Sep 30, 20261,001-5,000120 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 30, 2026 · View company records in RevenueBase
24Exact matchDuxford, United KingdomHQ recorded Sep 30, 202651-200116 contacts →

Exact match

“Better people, better business, better life.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 30, 20261,001-5,000114 contacts →

Exact match

“Different skillset.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase

Showing 25 of 2,294 HR business process outsourcing firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,820 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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HR business process outsourcing firms based in the United Kingdom at a glance

As of Sep 30, 2026
27.4%Verified-email coverage
5.1%Mobile-number coverage
20.4Average contacts per company
1-10Median size (employees)
26.4%Largest-city concentration · London
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
1,683
11-50
410
51-200
121
201-500
39
501-1,000
14
1,001-5,000
14
5,001-10,000
2
10001+
3

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 33.0d

Company record updated

Median 96.0d

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 business process 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 12,820 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.

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 business process outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many HR business process outsourcing firms are there based in the United Kingdom?

RevenueBase identified 2,294 company matches for HR business process 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 business process outsourcing firms?

London leads with 606 company records, followed by Manchester (63) and Bristol (31).

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 12,820 professional contacts with verified work emails tracked across these 2,294 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.

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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.