Company lists · Data refreshed November 2026

Top 24 Corporate intelligence agencies based in the United Kingdom

RevenueBase identified 327 company matches for corporate intelligence agencies associated with the United Kingdom as of November 2026 and tracks 2,595 professional contacts across them, including 823 with verified work emails. London is the largest hub.

This list covers company matches for corporate intelligence agencies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
327Companies
2,595Contacts tracked
823Verified emails
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The 24 largest corporate intelligence agencies based in the United Kingdom

Ranked by team size
Top 24 of 327 company matches for corporate intelligence agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchGlobal, United KingdomHQ recorded Nov 6, 2026201-500289 contacts →

Exact match

“Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200188 contacts →

Exact match

“We are a global advisory company that helps our clients enable their opportunities and manage key risks.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200126 contacts →

Exact match

“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBirmingham, United KingdomHQ recorded Nov 6, 202651-20074 contacts →

Exact match

“NetWatch Global® specialise in online investigations and are experts in social media and open source investigation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20067 contacts →

Exact match

“Prevail Partners are mission-enablers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5060 contacts →

Exact match

“Aperio Intelligence is an independent, integrity risk consultancy headquartered in the City of London.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 6, 2026n/a50 contacts →

Exact match

“Dragonfly is a geopolitical and security intelligence service for the world’s leading organisations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5048 contacts →

Exact match

“GSA Global is a specialist security, investigations and risk management consultancy helping organisations, families and individuals respond to serious, complex and emerging…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchEpsom, United KingdomHQ recorded Nov 6, 202651-20044 contacts →

Exact match

“Founded by Ken Dulieu, Capcon initially specialised in the provision of stocktaking and investigation services, before diversifying to include the provision of security personnel…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchNewark, United KingdomHQ recorded Nov 6, 202611-5044 contacts →

Exact match

“Investigation Limited is a well-established company offering Corporate Intelligence Services globally.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20042 contacts →

Exact match

“At VENOVOX, we are a premier consultancy in risk management and background screening, delivering specialised services in due diligence, security advisory, background checks, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5040 contacts →

Exact match

“Alaco is a leading business intelligence firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5039 contacts →

Exact match

“Harod Associates delivers global investigation and security solutions to complex crime and risk issues.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20039 contacts →

Exact match

“ICP is an independent, human-led research firm providing decision-grade intelligence on companies operating in markets where reliable data cannot be trusted.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCheadle Hulme, United KingdomHQ recorded Nov 6, 202651-20032 contacts →

Exact match

“RGI Solutions - Solving the Toughest Cases with Precision and Expertise Welcome to RGI Solutions, the leading independent investigations company in the UK!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchCity Of London, United KingdomHQ recorded Nov 6, 2026501-1,00026 contacts →

Exact match

“We are an established business risk management company approaching 20 years of service to our clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchOxford, United KingdomHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“Horus is a leading intelligence and security consultancy with a global, multilingual team of unrivalled experience, insight and operational expertise.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“We give our clients the confidence to identify opportunities, mitigate risks, tackle challenges and understand the landscapes they inhabit.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchAshford, United KingdomHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“The Inkerman Group is a specialist business risk, intelligence management and investigation company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchWorcester, United KingdomHQ recorded Nov 6, 202651-20017 contacts →

Exact match

“The UK’s leading Surveillance, Intelligence and Open Source Investigations company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Hartford is a specialist strategic and market intelligence firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20016 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 327 corporate intelligence agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 823 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Corporate intelligence agencies based in the United Kingdom at a glance

As of Nov 6, 2026
31.7%Verified-email coverage
7.9Average contacts per company
1-10Median size (employees)
55.7%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
189
11-50
97
51-200
23
201-500
6
501-1,000
2
1,001-5,000
2
5,001-10,000
1
10001+
1

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 327 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United Kingdom whose business descriptions match “corporate intelligence agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 823 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Corporate intelligence agencies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “corporate intelligence agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many corporate intelligence agencies are there based in the United Kingdom?

RevenueBase identified 327 company matches for corporate intelligence agencies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sibylline tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most corporate intelligence agencies?

London leads with 182 company records, followed by Leeds (5) and Edinburgh (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 823 professional contacts with verified work emails tracked across these 327 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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.