Company lists · Data refreshed September 2026

Top 25 Leadership assessment companies based in the United Kingdom

Name: Leadership assessment 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 20, 2026 334 companies tracked

RevenueBase identified 334 leadership assessment companies headquartered in the United Kingdom as of September 2026 and tracks 4,041 professional contacts across them, including 1,260 with verified work emails. London is the largest hub.

This list covers leadership assessment companies 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 20, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

334Companies

4,041Contacts tracked

1,260Verified emails

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The 25 largest leadership assessment companies based in the United Kingdom

Ranked by team size

Top 25 of 334 leadership assessment companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to leadership assessment companies: 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	Transearch	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	450 contacts →
	Partial evidence “TRANSEARCH International is a global executive search and leadership consulting organisation.” Source: RevenueBase Database · checked Sep 20, 2026
2	Pareto	Indirect evidence	Wilmslow, United KingdomHQ checked Sep 20, 2026	201-500	297 contacts →
	Indirect evidence “Pareto partner globally with organisations to take people from learning to leading.” Source: RevenueBase Database · checked Sep 20, 2026
3	Lumina Learning	Indirect evidence	Reading, United KingdomHQ checked Sep 20, 2026	51-200	186 contacts →
	Indirect evidence “It's our mission to empower the individuality of people, teams and leaders to be their best.” Source: RevenueBase Database · checked Sep 20, 2026
4	NEW Street Consulting Group Nscg	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	167 contacts →
	Partial evidence “We’re a leading people advisory consultancy that partners with you to source great executives, assess and develop leadership capabilities and expedite change and transformation.” Source: RevenueBase Database · checked Sep 20, 2026
5	Saville Assessment	Indirect evidence	New Malden, United KingdomHQ checked Sep 20, 2026	51-200	112 contacts →
	Indirect evidence “Every business is built on the quality of its people decisions.” Source: RevenueBase Database · checked Sep 20, 2026
6	DRAX	Partial evidence	Off The Strand, United KingdomHQ checked Sep 20, 2026	51-200	102 contacts →
	Partial evidence “DRAX helps investors and high growth companies unlock peak performance through our deep expertise in Leadership Advisory, Deal Advisor Sourcing and Executive Search.” Source: RevenueBase Database · checked Sep 20, 2026
7	Oxford HR B Corp	Partial evidence	Oxford, United KingdomHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “Oxford HR is a global leadership consultancy, supporting organisations across the world to find and support exceptional leaders and teams.” Source: RevenueBase Database · checked Sep 20, 2026
8	Calibre ONE	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	71 contacts →
	Partial evidence “Calibre One works with the builders of great companies– from iconic giants to VC and PE backed market pioneers – helping them to create diverse and high-performing leadership…” Source: RevenueBase Database · checked Sep 20, 2026
9	Savannah Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “Savannah Group is a next generation executive search and leadership consulting firm.” Source: RevenueBase Database · checked Sep 20, 2026
10	Odgers Berndtson	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	54 contacts →
	Strong evidence “We are a global executive search, interim management, talent assessment and leadership development firm.” Source: RevenueBase Database · checked Sep 20, 2026
11	The Lcap Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “LCap is the leadership advisory firm for high-growth and private-capital-backed companies using data, behavioural science and specialist expertise to predict, assess, and develop…” Source: RevenueBase Database · checked Sep 20, 2026
12	Essenta	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	38 contacts →
	Indirect evidence “We’re Essenta With offices in London and New York, we empower our clients to hire, lead and grow with confidence.” Source: RevenueBase Database · checked Sep 20, 2026
13	PER Ardua Associates	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “Per Ardua is united around a common mission – to support our clients exceed their ambitions by identifying, recruiting and developing the very best talent.” Source: RevenueBase Database · checked Sep 20, 2026
14	Veredus	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	36 contacts →
	Partial evidence “Veredus is a leadership solutions consultancy that gives organisations confidence in their most important decisions – the people they trust to lead, transform, and deliver results…” Source: RevenueBase Database · checked Sep 20, 2026
15	Heartstyles	Indirect evidence	Woking, United KingdomHQ checked Sep 20, 2026	11-50	36 contacts →
	Indirect evidence “Heartstyles fuels high-performance cultures by helping leaders break free from the limitations of ego-driven Pride and self-limiting Fear.” Source: RevenueBase Database · checked Sep 20, 2026
16	Facet5 LTD	Indirect evidence	Dry Drayton, United KingdomHQ checked Sep 20, 2026	51-200	35 contacts →
	Indirect evidence “At Facet5, we believe personality plays a vital role in how people think, connect, lead and perform at work.” Source: RevenueBase Database · checked Sep 20, 2026
17	The UP Group	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	34 contacts →
	Indirect evidence “Our clients are ambitious, category-defining organisations - VC and private equity backed, publicly listed and privately held - navigating scale and transformation.” Source: RevenueBase Database · checked Sep 20, 2026
18	Corporatedna Consulting	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Partial evidence “Corporate DNA Consulting is a global leadership firm with a ‘different’ mindset.” Source: RevenueBase Database · checked Sep 20, 2026
19	Psychological Consultancy Ltd. PCL	Partial evidence	Tunbridge Wells, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Partial evidence “Evidence-based insight for better leadership and stronger talent decisions.” Source: RevenueBase Database · checked Sep 20, 2026
20	TMS Development International LTD	Indirect evidence	York, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “At TMSDI we’re passionate about personal, team and organisational development.” Source: RevenueBase Database · checked Sep 20, 2026
21	Edgecumbe	Indirect evidence	Bristol, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “We are business psychologists.” Source: RevenueBase Database · checked Sep 20, 2026
22	Thrive	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Partial evidence “Thrive is transforming the way organisations make decisions about their people and culture using assessments and psychometrics.” Source: RevenueBase Database · checked Sep 20, 2026
23	HFI	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	17 contacts →
	Indirect evidence “At hfi, we help HR leaders and CEOs make smarter people decisions, faster.” Source: RevenueBase Database · checked Sep 20, 2026
24	Advanced People Strategies APS	Strong evidence	Daventry, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Strong evidence “As leadership and talent development specialists, and an Authorised Hogan Assessments Distributor for the UK & Ireland, our mission is to provide World-Class people development…” Source: RevenueBase Database · checked Sep 20, 2026
25	Minerva	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “We work with clients to develop outstanding teams, cultures and structures, specialising in headhunting, organisational development and leadership services.” Source: RevenueBase Database · checked Sep 20, 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: leadership assessment companies. 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 leadership assessment companies.
Partial evidence: Its own public description names part of leadership assessment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name leadership assessment companies. 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 334 leadership assessment companies based in the United Kingdom

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Leadership assessment companies based in the United Kingdom at a glance

As of Sep 20, 2026

31.2%Verified-email coverage

12.1Average contacts per company

1-10Median size (employees)

37.1%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

247

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 334 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 leadership assessment companies, 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 “leadership assessment companies”. 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 leadership assessment companies), 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 leadership assessment companies, 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, 1,260 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 20, 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.

Leadership assessment companies by metro

Leadership assessment companies in London124

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 leadership assessment companies, 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 leadership assessment companies are there based in the United Kingdom?

RevenueBase identified 334 leadership assessment companies 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?

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

Which city has the most leadership assessment companies?

London leads with 124 headquartered companies, followed by Bristol (6) and Cambridge (4).

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 1,260 verified decision-maker contacts tracked across these 334 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 20, 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.