Company lists · Data refreshed September 2026

Top 25 Employee relations consulting firms based in the United Kingdom

Name: Employee relations consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 3,340 companies tracked

RevenueBase identified 3,340 employee relations consulting firms headquartered in the United Kingdom as of September 2026 and tracks 22,198 professional contacts across them, including 7,266 with verified work emails and 2,622 with mobile numbers. London is the largest hub.

This list covers employee relations consulting firms headquartered in the 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 2, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

3,340Companies

22,198Contacts tracked

7,266Verified emails

2,622Mobile numbers

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The 25 largest employee relations consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 3,340 employee relations consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to employee relations consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Allegis Global Solutions	Indirect evidence	Bracknell, United Kingdom	1,001-5,000	2,930 contacts →
	Indirect evidence “At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Source: RevenueBase Database · checked Sep 2, 2026
2	Croner	Indirect evidence	Hinckley, United Kingdom	201-500	399 contacts →
	Indirect evidence “Our award winning HR and health & safety services free you from workforce admin and help keep you on the right side of the law.” Source: RevenueBase Database · checked Sep 2, 2026
3	Mercer UK	Indirect evidence	London, United Kingdom	10001+	334 contacts →
	Indirect evidence “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Source: RevenueBase Database · checked Sep 2, 2026
4	Ethos Farm	Partial evidence	New York, United Kingdom	1,001-5,000	264 contacts →
	Partial evidence “Award-winning Customer Experience and Employee Experience consultancy with offices in London and New York.” Source: RevenueBase Database · checked Sep 2, 2026
5	Karma Management Global Consulting Solutions PVT LTD	Indirect evidence	London, United Kingdom	51-200	254 contacts →
	Indirect evidence “Karma Management, an ISO 9001:2008 certified company, is a pioneer in developing and providing customized personnel solutions, uniquely conceptualized and designed in line with…” Source: RevenueBase Database · checked Sep 2, 2026
6	RHR International	Partial evidence	London, United Kingdom	201-500	209 contacts →
	Partial evidence “RHR is a globally respected leadership consulting firm that helps businesses drive performance and growth through data-led assessment, world-class coaching, and executive…” Source: RevenueBase Database · checked Sep 2, 2026
7	Circles North America	Partial evidence	London, United Kingdom	201-500	194 contacts →
	Partial evidence “We deliver employee support and workplace experience solutions to help companies grow their businesses, build communities in the workplace, and make a real difference in…” Source: RevenueBase Database · checked Sep 2, 2026
8	Consulting Point	Partial evidence	London, United Kingdom	51-200	168 contacts →
	Partial evidence “Consulting Point is a multi-award-winning talent strategy and advisory firm headquartered in the United Kingdom, with a truly global reach.” Source: RevenueBase Database · checked Sep 2, 2026
9	The HR Dept	Indirect evidence	Bristol, United Kingdom	51-200	167 contacts →
	Indirect evidence “Welcome to The HR Dept.” Source: RevenueBase Database · checked Sep 2, 2026
10	Frazer Jones	Indirect evidence	Holt, United Kingdom	51-200	141 contacts →
	Indirect evidence “We’re a global HR recruitment and executive search consultancy.” Source: RevenueBase Database · checked Sep 2, 2026
11	Eric Salmon & Partners	Partial evidence	United Kingdom	51-200	118 contacts →
	Partial evidence “Eric Salmon & Partners is a leading leadership and talent consulting firm that specializes in Executive Search, Governance Advisory & Leadership Advisory.” Source: RevenueBase Database · checked Sep 2, 2026
12	Norman Broadbent PLC	Indirect evidence	Edinburgh, United Kingdom	51-200	85 contacts →
	Indirect evidence “As a leading Professional Services firm, we offer five interrelated Talent Acquisition & Advisory Services to help Boards with the challenges they face.” Source: RevenueBase Database · checked Sep 2, 2026
13	Mackin Talent	Partial evidence	London, United Kingdom	51-200	77 contacts →
	Partial evidence “One of our most important values is Relationships Matter.” Source: RevenueBase Database · checked Sep 2, 2026
14	Wirehouse Employer Services	Partial evidence	Warrington, United Kingdom	51-200	76 contacts →
	Partial evidence “HR Consultancy \| Employment Law \| GDPR Service \| Health & Safety \| Fire Risk Assessments Call 033 33 215 005 or email info@wirehouse-es.com to arrange a quote for our services.” Source: RevenueBase Database · checked Sep 2, 2026
15	Blackwood Group	Indirect evidence	London, United Kingdom	51-200	69 contacts →
	Indirect evidence “Blackwood is a leading human capital advisory firm.” Source: RevenueBase Database · checked Sep 2, 2026
16	Nexus Search	Indirect evidence	London, United Kingdom	51-200	65 contacts →
	Indirect evidence “nexus – your global end to end supply chain leadership partner Nexus are an award winning hiring partner with over two decades’ experience in bringing top talent and clients…” Source: RevenueBase Database · checked Sep 2, 2026
17	PIB Employee Benefits	Strong evidence	York, United Kingdom	51-200	62 contacts →
	Strong evidence “Corporate Adviser Firm of the Year 2024 PIB Employee Benefits is a forward-thinking consulting business that specialises in supporting organisations who want to formulate an…” Source: RevenueBase Database · checked Sep 2, 2026
18	Oakleaf Partnership	Indirect evidence	Birmingham, United Kingdom	51-200	58 contacts →
	Indirect evidence “Since 2005, Oakleaf Partnership has been successfully placing people into jobs across every HR discipline, in every sector imaginable.” Source: RevenueBase Database · checked Sep 2, 2026
19	Milliman UK	Partial evidence	London, United Kingdom	1,001-5,000	57 contacts →
	Partial evidence “Milliman is among the world’s largest independent actuarial and consulting firms.” Source: RevenueBase Database · checked Sep 2, 2026
20	Randstad UK	Indirect evidence	Luton, United Kingdom	1,001-5,000	56 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 2, 2026
21	Pikon Germany	Partial evidence	Castle Donington, United Kingdom	51-200	55 contacts →
	Partial evidence “The PIKON International Consulting Group is comprised of PIKON Deutschland AG, PIKON Benelux NV and PIKON UK Ltd.” Source: RevenueBase Database · checked Sep 2, 2026
22	Warriorz Technologies	Partial evidence	London, United Kingdom	201-500	51 contacts →
	Partial evidence “In a highly technical industry of Information Technology, Warriorz Technologies Ltd is paving the way in Human Resource and Software consulting across the globe.” Source: RevenueBase Database · checked Sep 2, 2026
23	Aviserv	Indirect evidence	London, United Kingdom	201-500	40 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 2, 2026
24	Genius Consultants LTD	Indirect evidence	Manchester, United Kingdom	201-500	33 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 2, 2026
25	Verto HR	Indirect evidence	London, United Kingdom	201-500	31 contacts →
	Indirect evidence “Verto HR, professional in-house HR experts, jointly managing your external on-site property staff.” Source: RevenueBase Database · checked Sep 2, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: employee relations consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names employee relations consulting firms.
Partial evidence: Its own public description names part of employee relations consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name employee relations consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,340 employee relations consulting firms based in the United Kingdom

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Employee relations consulting firms based in the United Kingdom at a glance

As of Sep 2, 2026

32.7%Verified-email coverage

11.8%Mobile-number coverage

6.6Average contacts per company

1-10Median size (employees)

26.8%Largest-city concentration · London

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

2,763

11-50

416

51-200

201-500

501-1,000

1,001-5,000

10001+

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 employee relations consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “employee relations consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names employee relations consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among employee relations consulting firms, and records with no verified work email. Companies headquartered outside United Kingdom 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 its RevenueBase Smart Search 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, 7,266 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 2, 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.

Employee relations consulting firms by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names employee relations consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many employee relations consulting firms are there based in the United Kingdom?

RevenueBase identified 3,340 employee relations consulting firms headquartered in the 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?

Allegis Global Solutions, headquartered in Bracknell, tops this list with the largest team on record.

Which city has the most employee relations consulting firms?

London leads with 896 headquartered companies, followed by Manchester (71) and Bristol (57).

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 7,266 verified decision-maker contacts tracked across these 3,340 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 2, 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 Smart Search, 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.