Company lists · Data refreshed November 2026

Top 25 Investigative agencies worldwide

RevenueBase identified 3,374 company matches for investigative agencies worldwide as of November 2026 and tracks 82,221 professional contacts across them, including 14,062 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for investigative agencies worldwide, 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. Country and city lists for investigative agencies follow the table.

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
3,374Companies
82,221Contacts tracked
14,062Verified emails
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The 25 largest investigative agencies worldwide

Ranked by team size
Top 25 of 3,374 company matches for investigative agencies worldwide, 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 matchSantiago, ChileHQ recorded Nov 6, 20261,001-5,0001,800 contacts →

Exact match

“La labor de la Contraloría es eminentemente fiscalizadora; de carácter jurídico, contable y financiero, pues está destinada a cautelar el principio de legalidad, es decir…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchStockholm, SwedenHQ recorded Nov 6, 20261,001-5,000997 contacts →

Exact match

“The Swedish Prosecution Authority work in collaboration with other authorities to ensure that criminal investigations are carried out efficiently with legal certainty.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchTallahassee, FL, United StatesHQ recorded Nov 6, 20261,001-5,000718 contacts →

Exact match

“Our Mission To promote public safety and strengthen domestic security by providing services in partnership with local, state, and federal criminal justice agencies to prevent…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHerndon, VA, United StatesHQ recorded Nov 6, 20261,001-5,000696 contacts →

Exact match

“OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchZurich, SwitzerlandHQ recorded Nov 6, 20261,001-5,000602 contacts →

Exact match

“Rund 2’200 Personen arbeiten in der Direktion der Justiz und des Innern, im Generalsekretariat, in 4 Ämtern, 3 Fachämtern, 4 Fachstellen und zwei angegliederten Bereichen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSouth AfricaHQ recorded Nov 6, 2026501-1,000554 contacts →

Exact match

“The Special Investigating Unit is established in terms of the Special Investigating Units and Special Tribunals Act 74 of 1996.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchUnited StatesHQ recorded Nov 6, 20265,001-10,000492 contacts →

Exact match

“Dibentuk berdasarkan Undang-Undang Nomor 30 Tahun 2002 tentang Komisi Pemberantasan Tindak Pidana Korupsi, Komisi Pemberantasan Korupsi (KPK) diberi amanat melakukan pemberantasan…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchJacksonville, FL, United StatesHQ recorded Nov 6, 2026501-1,000377 contacts →

Exact match

“CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchUnited StatesHQ recorded Nov 6, 2026501-1,000373 contacts →

Exact match

“Investigate fraud, waste, and abuse in the NYS Medicaid program.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchNew York, NY, United StatesHQ recorded Nov 6, 2026201-500367 contacts →

Exact match

“Vcheck is a global investigations firm that helps institutions protect their investments by providing intelligence on individuals and entities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchDavis, CA, United StatesHQ recorded Nov 6, 2026201-500359 contacts →

Exact match

“DigiStream Investigations is a full-service private investigation firm specializing in insurance defense and legal support services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMoss, NorwayHQ recorded Nov 6, 2026501-1,000353 contacts →

Exact match

“Vi rekrutterer personer med høy kompetanse til et bredt og tverrfaglig miljø.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchThe Hague, NetherlandsHQ recorded Nov 6, 2026201-500329 contacts →

Exact match

“De Algemene Rekenkamer controleert of rijksoverheid geld uitgeeft en beleid uitvoert zoals het de bedoeling was.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchUnited StatesHQ recorded Nov 6, 2026201-500329 contacts →

Exact match

“Investgation of Civil Fraud through out the state.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchStockholm, SwedenHQ recorded Nov 6, 2026201-500298 contacts →

Exact match

“Riksrevisionen är en oberoende myndighet under riksdagen med uppdrag att granska statens verksamhet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchKannapolis, WA, United StatesHQ recorded Nov 6, 2026201-500225 contacts →

Exact match

“Advantage Investigations is a nationwide leader in the industry for investigative services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchIrvine, CA, United StatesHQ recorded Nov 6, 2026201-500222 contacts →

Exact match

“Frasco has hundreds of investigators and regional offices located throughout the country.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchCharlotte, TX, United StatesHQ recorded Nov 6, 20261,001-5,000210 contacts →

Exact match

“Alpine Intel is dedicated to innovation across the property, auto, liability, and workers' comp insurance fields-helping our customers reach peak performance throughout the policy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchFort Worth, TX, United StatesHQ recorded Nov 6, 202651-200152 contacts →

Exact match

“A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchKampala Kampala, UgandaHQ recorded Nov 6, 2026201-500145 contacts →

Exact match

“Inspectorate of Government is a government administration company based out of Uganda.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 202651-200143 contacts →

Exact match

“Alias Intelligence is a leading background investigations and due diligence company delivering the information and insights our clients need to grow and navigate their businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200139 contacts →

Exact match

“Corporate Research and Investigations Limited is a global provider of investigative research, background screening and business due diligence services for the world’s leading…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchNorth Haven, CT, United StatesHQ recorded Nov 6, 2026501-1,000138 contacts →

Exact match

“Knowledge is power" Whether you are an insurance company, TPA, insurance defense law firm, risk manager, private law firm, or corporation / business owner, we at Lemieux &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPune, IndiaHQ recorded Nov 6, 2026n/a135 contacts →

Exact match

“Mediprobe Consultancy Services Pvt Ltd is a leading insurance investigation agency with over 15 years of experience.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchChicago, IL, United StatesHQ recorded Nov 6, 202651-200133 contacts →

Exact match

“The City of Chicago Office of Inspector General (OIG) is an independent, nonpartisan oversight agency whose mission is to promote economy, effectiveness, efficiency, and integrity…”

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

Showing 25 of 3,374 investigative agencies worldwide

See the full list, filter by size, metro and specialty, and access 14,062 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Investigative agencies worldwide at a glance

As of Nov 6, 2026
17.1%Verified-email coverage
24.4Average contacts per company
1-10Median size (employees)
1.7%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,128
11-50
745
51-200
265
201-500
98
501-1,000
34
1,001-5,000
40
5,001-10,000
11
10001+
20

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for investigative agencies are linked below.
What qualifies
Company records worldwide whose business descriptions match “investigative 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. 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 14,062 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.

Investigative agencies by location

9 lists · largest first

Every Investigative agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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

How many investigative agencies are there worldwide?

RevenueBase identified 3,374 company matches for investigative agencies worldwide 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?

Contraloría General DE LA República tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most investigative agencies?

The United States leads with 1,514 companies, followed by Italy (185) and the United Kingdom (154). Every investigative agencies list by country and city is linked on this page.

Which city has the most investigative agencies?

London leads with 58 company records, followed by Washington (36) and New York (35).

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 14,062 professional contacts with verified work emails tracked across these 3,374 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.