Company lists · Data refreshed September 2026

Top 25 Recruitment process outsourcing companies based in London, United Kingdom

Name: Recruitment process outsourcing companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 503 companies tracked

RevenueBase identified 503 recruitment process outsourcing companies headquartered in London, United Kingdom as of September 2026 and tracks 11,727 professional contacts across them, including 1,569 with verified work emails. London is the largest hub.

This list covers recruitment process outsourcing companies headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

503Companies

11,727Contacts tracked

1,569Verified emails

Explore all 503 companies → Free signup · no credit card · 500 free credits

The 25 largest recruitment process outsourcing companies based in London, United Kingdom

Ranked by team size

Top 25 of 503 recruitment process outsourcing companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names recruitment process outsourcing companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Robert WaltersIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	4,423
	“Robert Walters is the world’s most trusted talent solutions business.” Source: company website · checked Sep 5, 2026
2	Page OutsourcingPartial evidence	London, United KingdomHQ checked Sep 5, 2026	5,001-10,000	390
	“Page Outsourcing was created to meet the business transformation needs of our clients.” Source: company website · checked Sep 5, 2026
3	Ubique SystemsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	333
	“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Source: company website · checked Sep 5, 2026
4	HuntressPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	289
	“Since our establishment in Huntress has been at the forefront of recruitment across a range of specialist sectors.” Source: company website · checked Sep 5, 2026
5	RethinkPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	225
	“Established in 2005 by Rethink Group, we deliver recruitment strategies for the curious: those who want to surpass their competition by attracting, engaging and hiring the best…” Source: company website · checked Sep 5, 2026
6	TotaljobsPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	196
	“Totaljobs is part of StepStone, one of the world’s leading next-generation recruitment solution providers.” Source: company website · checked Sep 5, 2026
7	The SR GroupPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	160
	“We are The SR Group, a global recruitment company comprising specialist search and recruitment consultancies Brewer Morris, Carter Murray, Frazer Jones and Taylor Root.” Source: company website · checked Sep 5, 2026
8	Ixceed SolutionsIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	137
	“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…” Source: company website · checked Sep 5, 2026
9	Newforce Global ServicesPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	128
	“Newforce provides global recruitment and workforce staffing solutions that help organizations access skilled talent across multiple markets.” Source: company website · checked Sep 5, 2026
10	SkillrecruitPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	125
	“Skilliantech Ltd, trading as “SkillRecruit”, is a specialist IT and Engineering recruitment agency delivering comprehensive coverage of recruitment services across all industries…” Source: company website · checked Sep 5, 2026
11	Peoplescout EmeaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	114
	“Different skillset.” Source: company website · checked Sep 5, 2026
12	Nicoll CurtinPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	109
	“Nicoll Curtin is an award-winning recruitment company specialising in technology and change verticals.” Source: company website · checked Sep 5, 2026
13	Hyphen Workforce SolutionsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	92
	“Hyphen is an industry leader in the fields of Recruitment Process Outsourcing (RPO) and Managed Service Programmes (MSP).” Source: company website · checked Sep 5, 2026
14	BPO RecruitPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	91
	“We are an executive recruitment firm based in the City of London and are specialists in the search and selection of professionals in Technology, Digital & RPA, BPO, Shared…” Source: company website · checked Sep 5, 2026
15	Resource SolutionsPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	68
	“Resource Solutions is a leading provider of recruitment and consultancy solutions, managing a recruitment budget of over £2 billion on behalf of our clients since 1997, as part of…” Source: company website · checked Sep 5, 2026
16	The Portfolio GroupPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	66
	“The Portfolio Group is a specialist recruitment agency dedicated to sourcing exceptional talent across four key divisions: Payroll, Credit Control, Procurement and HR, Benefits &…” Source: company website · checked Sep 5, 2026
17	HublancePartial evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	63
	“We are a global company established in 2002, that offers Recruitment, Contract and Compliance Solutions for global Companies.” Source: company website · checked Sep 5, 2026
18	VWA LTDPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	62
	“VWA is a London based recruitment consultancy specialising in the search and selection of exceptional talent.” Source: company website · checked Sep 5, 2026
19	Barclay SimpsonPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	59
	“Barclay Simpson is a specialist recruitment consultancy supporting blue-chip organisations across international markets.” Source: company website · checked Sep 5, 2026
20	Darwin RhodesPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	59
	“Darwin Rhodes has an unrivalled heritage and was one of the first recruitment firms to specialize in the Insurance market.” Source: company website · checked Sep 5, 2026
21	Career Moves Group I B CorpPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	53
	“Career Moves Group is a certified B Corp™ and women-owned boutique recruitment agency with over 15 years of experience.” Source: company website · checked Sep 5, 2026
22	TalentedgePartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	46
	“We deliver permanent, interim and RPO recruitment solutions across Finance, Technology, leadership talent for businesses ranging from investor-backed startups to global groups in…” Source: company website · checked Sep 5, 2026
23	Project RecruitIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	45
	“At Project Recruit, getting to know our clients is at the heart of what we do.” Source: company website · checked Sep 5, 2026
24	Aston HolmesIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	40
	“We deliver end-to-end talent solutions that create better futures and build better businesses.” Source: company website · checked Sep 5, 2026
25	AviservIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	40
	“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.” Source: company website · checked Sep 5, 2026

Showing 25 of 503 recruitment process outsourcing companies based in London, United Kingdom

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Recruitment process outsourcing companies based in London, United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 503 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

299

11-50

146

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 503 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among recruitment process outsourcing companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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: Companies headquartered in London, United Kingdom whose own description of what they do matches “recruitment process outsourcing companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among recruitment process outsourcing companies, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,569 across the full list. 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 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Recruitment process outsourcing companies by metro in the United Kingdom

Recruitment process outsourcing companies in London503
Recruitment process outsourcing companies in Manchester56
Recruitment process outsourcing companies in Leeds28
Recruitment process outsourcing companies in Birmingham26
Recruitment process outsourcing companies in Bristol25

Frequently asked

How many recruitment process outsourcing companies are there based in London, United Kingdom?

RevenueBase identified 503 recruitment process outsourcing companies headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Robert Walters, headquartered in London, tops this list with the largest team on record.

Which city has the most recruitment process outsourcing companies?

London leads with 503 headquartered companies, followed by Manchester (56) and Leeds (28).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,569 verified decision-maker contacts tracked across these 503 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 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.