Company lists · Data refreshed September 2026

Top 25 Investigator recruitment firms based in London, United Kingdom

Name: Investigator recruitment firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 85 companies tracked

RevenueBase identified 85 investigator recruitment firms headquartered in London, United Kingdom as of September 2026 and tracks 464 professional contacts across them, including 128 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers investigator recruitment firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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 28, 2026 86% judged on-target in blind review

85Companies

464Contacts tracked

128Verified emails

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The 25 largest investigator recruitment firms based in London, United Kingdom

Ranked by team size

Top 25 of 85 investigator recruitment firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to investigator recruitment 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	HAROD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Harod Associates delivers global investigation and security solutions to complex crime and risk issues.” Source: RevenueBase Database · checked Sep 28, 2026
2	Adaptive Business Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	29 contacts →
	Partial evidence “Adaptive Business Group serves an international client base via recruitment and M&A advisory teams across our offices in London, New York, San Diego, Singapore and Berlin.” Source: RevenueBase Database · checked Sep 28, 2026
3	Resource Professionals	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	21 contacts →
	Partial evidence “Resource Professionals are a firm of search consultants specialising in the recruitment to recruitment market.” Source: RevenueBase Database · checked Sep 28, 2026
4	Adamson & Partners	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Adamson & Partners is a leading global Executive Search firm specialising in Intellectual Property (IP), Legal appointments and M&A transactions.” Source: RevenueBase Database · checked Sep 28, 2026
5	Illapa Search	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Illapa Search is a Legal Executive Search firm, specialising in North America.” Source: RevenueBase Database · checked Sep 28, 2026
6	Diligence	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Partial evidence “Diligence is a private investigations firm, the output of our investigations help our clients make informed decisions bridging the gap between what they know and what they need to…” Source: RevenueBase Database · checked Sep 28, 2026
7	The Sales Experts LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “At The Sales Experts, we know the best commercial professionals are rarely found through traditional recruitment methods.” Source: RevenueBase Database · checked Sep 28, 2026
8	Palmer Mccarthy Recruitment Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	13 contacts →
	Indirect evidence “Founded in 2014, Palmer McCarthy has quickly become the first point of call for many employers and candidates within the security and facilities management industries.” Source: RevenueBase Database · checked Sep 28, 2026
9	LAZ Partners	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Founded almost a decade ago, Laz Partners is a specialist executive search and talent advisory firm focused exclusively on front-office investment talent across global macro…” Source: RevenueBase Database · checked Sep 28, 2026
10	Enteles Search	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “enteles Search was formed by Chris Meager and James Butler, two of the leading recruiters operating in the global security, resilience and investigative space.” Source: RevenueBase Database · checked Sep 28, 2026
11	Silverbridge	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “Silverbridge is an independent investigations and intelligence firm offering a full range of information gathering services.” Source: RevenueBase Database · checked Sep 28, 2026
12	Spalding Goobey	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Established in 1992, Spalding Goobey Associates specialises in the recruitment of market research and Insights professionals at all levels, from graduate trainee to managing…” Source: RevenueBase Database · checked Sep 28, 2026
13	Life Science Medics	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Life Science Medics is a leading boutique firm focused on the recruitment of experienced physicians in the Life Science industry.” Source: RevenueBase Database · checked Sep 28, 2026
14	KA Services UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	5 contacts →
	Indirect evidence “KA Services (UK) Limited is a well-established company serving to cater to the security and other staffing requirements of various high-status organizations.” Source: RevenueBase Database · checked Sep 28, 2026
15	Halliford Partners	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Our team at Halliford Partners has a combined total of more than 30 years’ experience in recruitment and research.” Source: RevenueBase Database · checked Sep 28, 2026
16	Temple Search Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Founded by Alison O'Donoghue, an experienced recruitment/search professional with a track record of successfully hiring specialised talent for a wide range of investment firms.” Source: RevenueBase Database · checked Sep 28, 2026
17	Melton Legal Search	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “We have firmly established ourselves at the forefront of legal recruitment, having been responsible for many of the market's highest profile moves, from individual partners and…” Source: RevenueBase Database · checked Sep 28, 2026
18	Brimstone Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Please hit the follow button and hear about jobs first!” Source: RevenueBase Database · checked Sep 28, 2026
19	Blue Cube	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Our industry knowledge, through over 25 years at the highest level of international law enforcement and corporate investigation gives us that unique ability to support your…” Source: RevenueBase Database · checked Sep 28, 2026
20	Naden Blair	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Market Research Specialist Recruitment Consultants.” Source: RevenueBase Database · checked Sep 28, 2026
21	LE Count Associates	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Le Count Associates is a leading firm in the niche market of Search-to-Search.” Source: RevenueBase Database · checked Sep 28, 2026
22	Clifton Global LLP	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “An international executive search firm focused on the placement of Senior Quants, Risk Officers, Technologists, Operations Executives, Big/ Alternative Data Executives for leading…” Source: RevenueBase Database · checked Sep 28, 2026
23	Daughters Of Sailors	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Daughters of Sailors offer market research agencies and in-house insight teams a flexible way to access recruitment expertise.” Source: RevenueBase Database · checked Sep 28, 2026
24	Godfathers Location Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “GODFATHERS LOCATION SOLUTIONS LIMITED is a security and investigations company based out of 264 A BELSIZE ROAD, LONDON, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026
25	Agora Life	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Agora Life är specialister på headhunting och search av mid-level till seniora rådgivare inom kapital, förmögenhet och försäkring.” Source: RevenueBase Database · checked Sep 28, 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: investigator recruitment 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 investigator recruitment firms.
Partial evidence: Its own public description names part of investigator recruitment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigator recruitment 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 85 investigator recruitment firms based in London, United Kingdom

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Investigator recruitment firms based in London, United Kingdom at a glance

As of Sep 28, 2026

27.6%Verified-email coverage

5.5Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 85 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 investigator recruitment 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 London, United Kingdom whose own description of what they do matches “investigator recruitment 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 investigator recruitment 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 investigator recruitment firms, 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 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, 128 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 28, 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.

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 investigator recruitment 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 investigator recruitment firms are there based in London, United Kingdom?

RevenueBase identified 85 investigator recruitment firms 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?

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

Which city in the United Kingdom has the most investigator recruitment firms?

London leads the United Kingdom with 85 headquartered companies, followed by Bristol (4) and Liverpool (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 128 verified decision-maker contacts tracked across these 85 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 28, 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.