Company lists · Data refreshed September 2026

Top 25 Legal investigation services based in the United States

RevenueBase identified 1,389 company matches for legal investigation services associated with the United States as of September 2026 and tracks 7,343 professional contacts across them, including 1,898 with verified work emails. New York is the largest hub.

This list covers company matches for legal investigation services associated with the United States, 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 September 20, 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 Sep 20, 2026 How this list was built
1,389Companies
7,343Contacts tracked
1,898Verified emails
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The 25 largest legal investigation services based in the United States

Ranked by team size
Top 25 of 1,389 company matches for legal investigation services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 matchJacksonville, FL, United StatesHQ recorded Sep 20, 2026501-1,000518 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 · Sep 20, 2026 · View company records in RevenueBase
2Exact matchDavis, CA, United StatesHQ recorded Sep 20, 2026201-500327 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 · Sep 20, 2026 · View company records in RevenueBase
3Exact matchBroussard, LA, United StatesHQ recorded Sep 20, 2026501-1,000292 contacts →

Exact match

“HUB Enterprises is a national insurance defense investigative firm.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchKannapolis, NC, United StatesHQ recorded Sep 20, 2026201-500214 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202651-200129 contacts →

Exact match

“Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchNorth Haven, CT, United StatesHQ recorded Sep 20, 2026501-1,000119 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 · Sep 20, 2026 · View company records in RevenueBase
7Exact matchUnited StatesHQ recorded Sep 20, 2026201-50094 contacts →

Exact match

“Why Becker & Company?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchHuntington Beach, CA, United StatesHQ recorded Sep 20, 202651-20084 contacts →

Exact match

“Horsemen Investigations is a full service investigation company, specializing in investigating insurance fraud and in minimizing risk exposure.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Sep 20, 2026201-50072 contacts →

Exact match

“Integrated Security Services, Inc.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchMonaca, PA, United StatesHQ recorded Sep 20, 2026201-50069 contacts →

Exact match

“CSI is a full-service investigative firm that delivers key facts to give our clients an actionable advantage in a wide range of situations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchWoburn, MA, United StatesHQ recorded Sep 20, 2026201-50067 contacts →

Exact match

“Claims Bureau USA has been providing Insurers, TPA's and their defense counsel with quality, in-depth investigative services since 1956.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchSacramento, CA, United StatesHQ recorded Sep 20, 202651-20057 contacts →

Exact match

“Today’s professionals rely on investigative firms to help manage risk by detecting and preempting problem situations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchLancaster, PA, United StatesHQ recorded Sep 20, 202651-20050 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchNew Bedford, MA, United StatesHQ recorded Sep 20, 202611-5050 contacts →

Exact match

“Established in 1981, Data Quest, Ltd.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchRiverside, CA, United StatesHQ recorded Sep 20, 202651-20049 contacts →

Exact match

“Bosco Legal is a litigation support firm providing legal and investigative services to lawyers, insurance companies, and private individuals throughout the United States.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchParsippany, NJ, United StatesHQ recorded Sep 20, 202611-5044 contacts →

Exact match

“At National Forensic Consultants, Inc.®, we specialize in multi-disciplinary forensic investigation, offering comprehensive services to the legal, insurance, product…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202651-20042 contacts →

Exact match

“Hilton Global Associates is a professional investigative research firm providing expert due diligence and unparalleled client service.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchTustin, CA, United StatesHQ recorded Sep 20, 202651-20041 contacts →

Exact match

“Established in 1987, RJN Investigations, Inc.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchTemecula, CA, United StatesHQ recorded Sep 20, 202651-20039 contacts →

Exact match

“Hodson P.I.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchMedford, NJ, United StatesHQ recorded Sep 20, 202651-20038 contacts →

Exact match

“AIC Companies is the premier investigative firm in the industry with a unique and innovative collection of investigative services including Same Day Surveillance, S.M.A.R.T.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchClinton Township, MI, United StatesHQ recorded Sep 20, 202611-5034 contacts →

Exact match

“Sherlock Investigations is a Michigan-based investigative firm delivering litigation-grade intelligence and analytical insight for insurers, SIU teams, and defense counsel.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202611-5029 contacts →

Exact match

“Corporate Resolutions Inc.(CRI) specializes in background investigations for the alternative investment and legal communities.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchPhoenix, AZ, United StatesHQ recorded Sep 20, 202611-5027 contacts →

Exact match

“Subrosa is a full-service private investigative firm, providing customized services ranging from thorough background checks, to undercover surveillance, to corporate due diligence…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchKingwood, TX, United StatesHQ recorded Sep 20, 202611-5026 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchMiami, FL, United StatesHQ recorded Sep 20, 20261-1026 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 1,389 legal investigation services based in the United States

See the full list, filter by size, metro and specialty, and access 1,898 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legal investigation services based in the United States at a glance

As of Sep 20, 2026
25.8%Verified-email coverage
5.3Average contacts per company
1-10Median size (employees)
2.2%Largest-city concentration · New York
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
1,033
11-50
276
51-200
57
201-500
16
501-1,000
5

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,389 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 States whose business descriptions match “legal investigation services” 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 1,898 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 September 20, 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.

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 “legal investigation services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legal investigation services are there based in the United States?

RevenueBase identified 1,389 company matches for legal investigation services associated with the United States as of September 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?

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

Which city has the most legal investigation services?

New York leads with 31 company records, followed by Miami (22) and Houston (20).

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 1,898 professional contacts with verified work emails tracked across these 1,389 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 September 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,389 legal investigation services based in the United States. Start with a free account, no credit card.

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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.