Company lists · Data refreshed September 2026

Top 25 Intelligence business consulting firms based in the United Kingdom

Name: Intelligence business 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 21, 2026 2,822 companies tracked

RevenueBase identified 2,822 intelligence business consulting firms headquartered in the United Kingdom as of September 2026 and tracks 36,845 professional contacts across them, including 11,976 with verified work emails. London is the largest hub.

This list covers intelligence business 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 21, 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 21, 2026 86% judged on-target in blind review

2,822Companies

36,845Contacts tracked

11,976Verified emails

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The 25 largest intelligence business consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 2,822 intelligence business consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to intelligence business 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	Globaldata PLC	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,779 contacts →
	Indirect evidence “In a world drowning in data, we deliver clarity.” Source: RevenueBase Database · checked Sep 21, 2026
2	Mintel	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,475 contacts →
	Indirect evidence “At Mintel, we empower businesses to navigate the future with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
3	HKA	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,129 contacts →
	Indirect evidence “HKA is the leading global consultancy in risk mitigation, forensic investigations, dispute resolution, expert witness and litigation support services.” Source: RevenueBase Database · checked Sep 21, 2026
4	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	1,011 contacts →
	Indirect evidence “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Source: RevenueBase Database · checked Sep 21, 2026
5	First Derivative	Indirect evidence	Newry, United KingdomHQ checked Sep 21, 2026	1,001-5,000	988 contacts →
	Indirect evidence “First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward.” Source: RevenueBase Database · checked Sep 21, 2026
6	The Smart Cube	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	702 contacts →
	Partial evidence “We provide high performing intelligence that answers critical business questions for leading companies around the world.” Source: RevenueBase Database · checked Sep 21, 2026
7	Infiniti Research LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	651 contacts →
	Partial evidence “Infiniti Research is a leading provider of market intelligence and customer intelligence solutions with 20+ years’ experience spanning across 20+ industries.” Source: RevenueBase Database · checked Sep 21, 2026
8	JANES	Indirect evidence	Croydon, United KingdomHQ checked Sep 21, 2026	501-1,000	608 contacts →
	Indirect evidence “In a complex global landscape, leaders need accurate information and full context quickly.” Source: RevenueBase Database · checked Sep 21, 2026
9	Savanta	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	464 contacts →
	Indirect evidence “Savanta is a fast-growing data, market research and advisory company.” Source: RevenueBase Database · checked Sep 21, 2026
10	Analysys Mason	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	459 contacts →
	Indirect evidence “Analysys Mason is the leading specialist consultancy, creating lasting value in technology-intensive industries, including telecoms, digital infrastructure, software, IT services…” Source: RevenueBase Database · checked Sep 21, 2026
11	S-Rm	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	351 contacts →
	Partial evidence “S-RM is a global intelligence and cyber security consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
12	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	302 contacts →
	Partial evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 21, 2026
13	Sibylline	Partial evidence	Global, United KingdomHQ checked Sep 21, 2026	201-500	289 contacts →
	Partial evidence “Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Source: RevenueBase Database · checked Sep 21, 2026
14	Elixirr	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	275 contacts →
	Partial evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 21, 2026
15	CT Group	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	233 contacts →
	Partial evidence “CT Group is a global consultancy that uniquely combines research, intelligence, campaigns and advisory services, to deliver the results our clients need.” Source: RevenueBase Database · checked Sep 21, 2026
16	Thorogood	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	230 contacts →
	Indirect evidence “Thorogood is an independent consultancy that provides end-to-end data, AI and analytics solutions.” Source: RevenueBase Database · checked Sep 21, 2026
17	Portland	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	229 contacts →
	Indirect evidence “Portland is a consultancy specialising in public affairs, corporate affairs and geopolitics.” Source: RevenueBase Database · checked Sep 21, 2026
18	Quantzig	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	216 contacts →
	Indirect evidence “Quantzig is at the forefront of partnering with businesses to help them unlock transformative value through analytics solutions.” Source: RevenueBase Database · checked Sep 21, 2026
19	Gatenbysanderson	Partial evidence	Leeds, United KingdomHQ checked Sep 21, 2026	51-200	202 contacts →
	Partial evidence “GatenbySanderson is the UK's leading people intelligence advisory business.” Source: RevenueBase Database · checked Sep 21, 2026
20	Clarify	Indirect evidence	Theale, United KingdomHQ checked Sep 21, 2026	51-200	191 contacts →
	Indirect evidence “Clarify helps global Technology companies achieve sustained and significant commercial success.” Source: RevenueBase Database · checked Sep 21, 2026
21	True North Partners	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	185 contacts →
	Partial evidence “True North Partners LLP is an independent consulting firm based in London, Johannesburg, Frankfurt, Amsterdam and Madrid.” Source: RevenueBase Database · checked Sep 21, 2026
22	Schillings	Indirect evidence	12 Arthur Street, United KingdomHQ checked Sep 21, 2026	51-200	161 contacts →
	Indirect evidence “Schillings deploys a unique combination of expertise to help you handle high stakes opportunities and threats, because we believe everyone has a right to fair treatment of their…” Source: RevenueBase Database · checked Sep 21, 2026
23	G3	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	159 contacts →
	Indirect evidence “We are a global advisory company that helps our clients enable their opportunities and manage key risks.” Source: RevenueBase Database · checked Sep 21, 2026
24	MTM	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	159 contacts →
	Indirect evidence “MTM is the trusted insight and strategy partner tackling the biggest challenges for the world's biggest brands.” Source: RevenueBase Database · checked Sep 21, 2026
25	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	126 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Sep 21, 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: intelligence business 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 intelligence business consulting firms.
Partial evidence: Its own public description names part of intelligence business consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name intelligence business 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 2,822 intelligence business consulting firms based in the United Kingdom

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Intelligence business consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026

32.5%Verified-email coverage

13.1Average contacts per company

1-10Median size (employees)

44.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,048

11-50

510

51-200

156

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,822 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 intelligence business 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 “intelligence business 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 intelligence business 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 intelligence business 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, 11,976 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 21, 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.

Intelligence business 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 intelligence business 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 intelligence business consulting firms are there based in the United Kingdom?

RevenueBase identified 2,822 intelligence business 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?

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

Which city has the most intelligence business consulting firms?

London leads with 1266 headquartered companies, followed by Manchester (52) and Bristol (34).

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 11,976 verified decision-maker contacts tracked across these 2,822 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 21, 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.