Company lists · Data refreshed November 2026

Top 25 Detective agencies based in the United Kingdom

RevenueBase identified 327 company matches for detective agencies associated with the United Kingdom as of November 2026 and tracks 1,524 professional contacts across them, including 266 with verified work emails. London is the largest hub.

This list covers company matches for detective 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
1,524Contacts tracked
266Verified emails
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The 25 largest detective agencies based in the United Kingdom

Ranked by team size
Top 25 of 327 company matches for detective 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 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
2Exact matchBolton, United KingdomHQ recorded Nov 6, 202651-20053 contacts →

Exact match

“ExamWorks Investigation Services is a leading claims investigation company providing the insurance, banking, retail and other sectors with a range of innovative and cost effective…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact 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
4Exact 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
5Exact matchLeeds, United KingdomHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Tremark Associates Ltd is an experienced, knowledgeable, high-quality professional investigation business that delivers a reputable, proven service to clients across the UK and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBuchurst Hill, United KingdomHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“Leading intellectual property crime investigations company engaged in frontline operational activity targeting those who commit offences against the intellectual property rights…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchDuxford, United KingdomHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“The digital age is the new normal.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact 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
9Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“Computer Forensics Lab investigates and analyses computer user behaviour and gathers digital evidence for civil or criminal action.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCambridge, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Technology & Forensic Investigation Company for Asset Tracing, Fraud, & Financial Disputes When your money, assets, or reputation are at risk, you need answers you can trust.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Quest provides bespoke investigations, integrity and security services to corporate clients, sports organisations, and high net worth individuals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchFareham, United KingdomHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“Who we are: We are an independent privately owned company founded in 1997 with an extensive field force of over 100 accredited professional field agents, covering the length and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchNorwich, United KingdomHQ recorded Nov 6, 20261-109 contacts →

Exact match

“We are a Private Investigation company offering services nationwide and worldwide to both private and commercial clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-109 contacts →

Exact match

“We are a full-service corporate intelligence and investigations firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-109 contacts →

Exact match

“Silverbridge is an independent investigations and intelligence firm offering a full range of information gathering services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchKidderminster, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Keeping your assets safe - people, data, property and other physical assets.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchGlasgow, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“For many years ID Inquiries have performed corporate investigations and brand protection services for high-profile clients, in sectors such as premium broadcast protection and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchSudbury, United KingdomHQ recorded Nov 6, 20261-108 contacts →

Exact match

“IntraOrbis was founded in 2004 and quickly established itself within the Brand Protection sector as an international solution provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-108 contacts →

Exact match

“InsightX is a specialist independent intelligence, investigations and due diligence agency.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSevenoaks, United KingdomHQ recorded Nov 6, 20261-108 contacts →

Exact match

“GARANCIE is an independent company specialising in public record searches and Enhanced Due Diligence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchTadcaster, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Arkline provides legal and investigation services to law firms and banks such as Tracing, Beneficiary Tracing, Process Serving, Means Reports, Company Reports & Bespoke…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“PEL Consultancy Services provides discreet investigation and intelligence support for private clients, legal professionals, businesses and family offices.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchIsleworth, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“We are a leading international investigation and discovery company with five UK offices and a network of agents worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchManchester, United KingdomHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Legate Group provides theft and fraud investigation services to motor & asset finance and fleet lessor sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchMarket Harborough, United KingdomHQ recorded Nov 6, 202611-506 contacts →

Exact match

“DLB Investigations Ltd was founded on experience and knowledge.”

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

Showing 25 of 327 detective agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 266 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Detective agencies based in the United Kingdom at a glance

As of Nov 6, 2026
17.5%Verified-email coverage
4.7Average contacts per company
1-10Median size (employees)
30.9%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
225
11-50
61
51-200
21
201-500
4
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 “detective 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 266 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.

Detective 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 “detective agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many detective agencies are there based in the United Kingdom?

RevenueBase identified 327 company matches for detective 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?

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

Which city has the most detective agencies?

London leads with 101 company records, followed by Birmingham (9) and Manchester (9).

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 266 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.