Company lists · Data refreshed November 2026
Top 25 Private investigation services based in the United States
RevenueBase identified 1,831 company matches for private investigation services associated with the United States as of November 2026 and tracks 11,163 professional contacts across them, including 2,605 with verified work emails. New York is the largest hub.
This list covers company matches for private 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 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.
The 25 largest private investigation services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 592 contacts → | ||||
Exact match “DK Security is unique in that it offers a single company for a wide ranging availability of security and investigative services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 377 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 | |||||
| 3 | 359 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 | |||||
| 4 | 225 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 | |||||
| 5 | 222 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 | |||||
| 6 | 152 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 | |||||
| 7 | 143 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 | |||||
| 8 | 138 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 | |||||
| 9 | 130 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 121 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 108 contacts → | ||||
Exact match “MSM Security Services, LLC (MSM) is an experienced company providing Investigative Services, Risk Analysis and Screening support for business and employment requirements.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 104 contacts → | ||||
Exact match “Why Becker & Company?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 101 contacts → | ||||
Exact match “The Robison Group is an agency of professional investigators and support teams offering surveillance, SIU claims, business risk mitigation and comprehensive desktop investigation…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 94 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 91 contacts → | ||||
Exact match “AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 75 contacts → | ||||
Exact match “Integrated Security Services, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 73 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 70 contacts → | ||||
Exact match “Investigative Group International (IGI) is the premier investigative firm conducting independent, high-touch investigations worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 66 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 65 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 65 contacts → | ||||
Exact match “Founded in 1978, Smith & Carson is a trusted and highly experienced investigative research firm that partners with the world's leading organizations to handle complex…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 57 contacts → | ||||
Exact match “For over 30 years, Roman & Associates has been a prominent and full-service Investigations & Risk Management firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 57 contacts → | ||||
Exact match “Stewart & Associates was founded in 1987 by Brian W.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 51 contacts → | ||||
Exact match “Founded in 1996, Tracers empowers attorneys, law enforcement, private investigators, collection professionals, fraud prevention specialists, and the background screening industry…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 50 contacts → | ||||
Exact match “Established in 1981, Data Quest, Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “private investigation services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,831 private investigation services based in the United States
See the full list, filter by size, metro and specialty, and access 2,605 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Private investigation services based in the United States at a glance
As of Nov 6, 2026Companies by employee count
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 1,831 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 “private 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 2,605 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.
Private investigation services 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 “private investigation services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many private investigation services are there based in the United States?
RevenueBase identified 1,831 company matches for private investigation services associated with the United States 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?
DK Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most private investigation services?
New York leads with 39 company records, followed by Miami (28) and Houston (24).
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 2,605 professional contacts with verified work emails tracked across these 1,831 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.
Ready to reach these companies? Verified emails and direct dials for all 1,831 private investigation services based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Private investigation services by geography
- Private investigation services based in London, United Kingdom
- Private investigation services based in Miami, United States
- Private investigation services based in New York, United States
- Private investigation services based in Australia
- Private investigation services based in Canada
- Private investigation services based in Italy
- Private investigation services based in the Netherlands
- Private investigation services based in the United Kingdom
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Private investigation services based in London, United Kingdom
- Private investigation services based in Miami, United States
- Private investigation services based in New York, United States
- Private investigation services based in Australia
- Private investigation services based in Canada
- Private investigation services based in Italy
Company intelligence · public preview
Top 25 private investigation services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,831 matching company records for private investigation services based in the United States, with 11,163 tracked contacts and 2,605 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 private investigation services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  DK Securitydksecurity.comHQ: Grand Rapids, MI, United StatesReported employees: 1,001-5,000 | Grand Rapids, MI, United States | 1,001-5,000 | Exact match | 592 contacts → |
“DK Security is unique in that it offers a single company for a wide ranging availability of security and investigative services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Coventbridge Groupcoventbridge.comHQ: Jacksonville, FL, United StatesReported employees: 501-1,000 | Jacksonville, FL, United States | 501-1,000 | Exact match | 377 contacts → |
“CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Digistream Investigationsdigistream.comHQ: Davis, CA, United StatesReported employees: 201-500 | Davis, CA, United States | 201-500 | Exact match | 359 contacts → |
“DigiStream Investigations is a full-service private investigation firm specializing in insurance defense and legal support services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Advantage Investigationsadvantageinvestigations.comHQ: Kannapolis, WA, United StatesReported employees: 201-500 | Kannapolis, WA, United States | 201-500 | Exact match | 225 contacts → |
“Advantage Investigations is a nationwide leader in the industry for investigative services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Frascofrasco.comHQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 222 contacts → |
“Frasco has hundreds of investigators and regional offices located throughout the country.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Information Discovery Services LLCinformationdiscovery.netHQ: Fort Worth, TX, United StatesReported employees: 51-200 | Fort Worth, TX, United States | 51-200 | Exact match | 152 contacts → |
“A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Alias Intelligencealiasintelligence.comHQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 143 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Lemieux & Associateslemieuxassociates.comHQ: North Haven, CT, United StatesReported employees: 501-1,000 | North Haven, CT, United States | 501-1,000 | Exact match | 138 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Beau Dietl & Associatesinvestigations.comHQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 130 contacts → |
“Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Nardello & COnardelloandco.comHQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 121 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 |  MSM Security Services LLCmsmsecurity.comHQ: Chevy Chase, MD, United StatesReported employees: 51-200 | Chevy Chase, MD, United States | 51-200 | Exact match | 108 contacts → |
“MSM Security Services, LLC (MSM) is an experienced company providing Investigative Services, Risk Analysis and Screening support for business and employment requirements.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Becker & Company, INCbeckerpi.comHQ: United StatesReported employees: 201-500 | United States | 201-500 | Exact match | 104 contacts → |
“Why Becker & Company?” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  The Robison Grouptherobisongroup.comHQ: Troy, MI, United StatesReported employees: 201-500 | Troy, MI, United States | 201-500 | Exact match | 101 contacts → |
“The Robison Group is an agency of professional investigators and support teams offering surveillance, SIU claims, business risk mitigation and comprehensive desktop investigation…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Horsemen Investigationshorsemeninc.comHQ: Huntington Beach, CA, United StatesReported employees: 51-200 | Huntington Beach, CA, United States | 51-200 | Exact match | 94 contacts → |
“Horsemen Investigations is a full service investigation company, specializing in investigating insurance fraud and in minimizing risk exposure.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  AJ Squared Securityaj2security.comHQ: New York, NJ, United StatesReported employees: 201-500 | New York, NJ, United States | 201-500 | Exact match | 91 contacts → |
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Integrated Security Servicesintesecurity.comHQ: New York, FL, United StatesReported employees: 201-500 | New York, FL, United States | 201-500 | Exact match | 75 contacts → |
“Integrated Security Services, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  CSI Corporate Security And Investigationscsiinvestigators.comHQ: Monaca, PA, United StatesReported employees: 201-500 | Monaca, PA, United States | 201-500 | Exact match | 73 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Investigative Group Internationaligint.comHQ: Washington, DC, United StatesReported employees: 11-50 | Washington, DC, United States | 11-50 | Exact match | 70 contacts → |
“Investigative Group International (IGI) is the premier investigative firm conducting independent, high-touch investigations worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Claims Bureau USAclaimsbureau.comHQ: Woburn, MA, United StatesReported employees: 201-500 | Woburn, MA, United States | 201-500 | Exact match | 66 contacts → |
“Claims Bureau USA has been providing Insurers, TPA's and their defense counsel with quality, in-depth investigative services since 1956.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Apex Investigationapexpi.comHQ: Sacramento, CA, United StatesReported employees: 51-200 | Sacramento, CA, United States | 51-200 | Exact match | 65 contacts → |
“Today’s professionals rely on investigative firms to help manage risk by detecting and preempting problem situations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Smith & Carsonsmithcarson.comHQ: Alpharetta, NJ, United StatesReported employees: 51-200 | Alpharetta, NJ, United States | 51-200 | Exact match | 65 contacts → |
“Founded in 1978, Smith & Carson is a trusted and highly experienced investigative research firm that partners with the world's leading organizations to handle complex…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Roman & Associatesromansearch.comHQ: Uniondale, NY, United StatesReported employees: 51-200 | Uniondale, NY, United States | 51-200 | Exact match | 57 contacts → |
“For over 30 years, Roman & Associates has been a prominent and full-service Investigations & Risk Management firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Stewart & Associates INCbwstewart.comHQ: Freeport, IL, United StatesReported employees: 201-500 | Freeport, IL, United States | 201-500 | Exact match | 57 contacts → |
“Stewart & Associates was founded in 1987 by Brian W.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Tracerstracers.comHQ: Brooksville, FL, United StatesReported employees: 51-200 | Brooksville, FL, United States | 51-200 | Exact match | 51 contacts → |
“Founded in 1996, Tracers empowers attorneys, law enforcement, private investigators, collection professionals, fraud prevention specialists, and the background screening industry…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Data Quest LTDdataquestltd.comHQ: New Bedford, NY, United StatesReported employees: 11-50 | New Bedford, NY, United States | 11-50 | Exact match | 50 contacts → |
“Established in 1981, Data Quest, Ltd.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,831 company matches
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Private investigation services: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,819 records in the displayed employee bands.
12 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,831 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Private investigation services by metro
Questions about this company list
What does Exact match mean for private investigation services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many private investigation services did RevenueBase find based in the United States?
The saved snapshot records 1,831 matching company records, 11,163 tracked contacts and 2,605 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Private investigation services by geography
- Private investigation services based in London, United Kingdom
- Private investigation services based in Miami, United States
- Private investigation services based in New York, United States
- Private investigation services based in Australia
- Private investigation services based in Canada
- Private investigation services based in Italy
- Private investigation services based in the Netherlands
- Private investigation services based in the United Kingdom
Cite this list
RevenueBase Data Team. Top 25 private investigation services based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/private-investigation-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Private investigation services based in London, United Kingdom
- Private investigation services based in Miami, United States
- Private investigation services based in New York, United States
- Private investigation services based in Australia
- Private investigation services based in Canada
- Private investigation services based in Italy
Company intelligence · public preview
Top 25 private investigation services based in the United States
RevenueBase records 1,831 matching company records for private investigation services based in the United States, with 11,163 tracked contacts and 2,605 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 private investigation services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | DK Securitydksecurity.com HQ: Grand Rapids, MI, United StatesReported employees: 1,001-5,000 | Grand Rapids, MI, United States | 1,001-5,000 | Exact match | 592 contacts → |
“DK Security is unique in that it offers a single company for a wide ranging availability of security and investigative services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Coventbridge Groupcoventbridge.com HQ: Jacksonville, FL, United StatesReported employees: 501-1,000 | Jacksonville, FL, United States | 501-1,000 | Exact match | 377 contacts → |
“CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Digistream Investigationsdigistream.com HQ: Davis, CA, United StatesReported employees: 201-500 | Davis, CA, United States | 201-500 | Exact match | 359 contacts → |
“DigiStream Investigations is a full-service private investigation firm specializing in insurance defense and legal support services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Advantage Investigationsadvantageinvestigations.com HQ: Kannapolis, WA, United StatesReported employees: 201-500 | Kannapolis, WA, United States | 201-500 | Exact match | 225 contacts → |
“Advantage Investigations is a nationwide leader in the industry for investigative services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Frascofrasco.com HQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 222 contacts → |
“Frasco has hundreds of investigators and regional offices located throughout the country.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Information Discovery Services LLCinformationdiscovery.net HQ: Fort Worth, TX, United StatesReported employees: 51-200 | Fort Worth, TX, United States | 51-200 | Exact match | 152 contacts → |
“A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Alias Intelligencealiasintelligence.com HQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 143 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Lemieux & Associateslemieuxassociates.com HQ: North Haven, CT, United StatesReported employees: 501-1,000 | North Haven, CT, United States | 501-1,000 | Exact match | 138 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Beau Dietl & Associatesinvestigations.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 130 contacts → |
“Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Nardello & COnardelloandco.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 121 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | MSM Security Services LLCmsmsecurity.com HQ: Chevy Chase, MD, United StatesReported employees: 51-200 | Chevy Chase, MD, United States | 51-200 | Exact match | 108 contacts → |
“MSM Security Services, LLC (MSM) is an experienced company providing Investigative Services, Risk Analysis and Screening support for business and employment requirements.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Becker & Company, INCbeckerpi.com HQ: United StatesReported employees: 201-500 | United States | 201-500 | Exact match | 104 contacts → |
“Why Becker & Company?” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | The Robison Grouptherobisongroup.com HQ: Troy, MI, United StatesReported employees: 201-500 | Troy, MI, United States | 201-500 | Exact match | 101 contacts → |
“The Robison Group is an agency of professional investigators and support teams offering surveillance, SIU claims, business risk mitigation and comprehensive desktop investigation…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Horsemen Investigationshorsemeninc.com HQ: Huntington Beach, CA, United StatesReported employees: 51-200 | Huntington Beach, CA, United States | 51-200 | Exact match | 94 contacts → |
“Horsemen Investigations is a full service investigation company, specializing in investigating insurance fraud and in minimizing risk exposure.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | AJ Squared Securityaj2security.com HQ: New York, NJ, United StatesReported employees: 201-500 | New York, NJ, United States | 201-500 | Exact match | 91 contacts → |
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Integrated Security Servicesintesecurity.com HQ: New York, FL, United StatesReported employees: 201-500 | New York, FL, United States | 201-500 | Exact match | 75 contacts → |
“Integrated Security Services, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | CSI Corporate Security And Investigationscsiinvestigators.com HQ: Monaca, PA, United StatesReported employees: 201-500 | Monaca, PA, United States | 201-500 | Exact match | 73 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Investigative Group Internationaligint.com HQ: Washington, DC, United StatesReported employees: 11-50 | Washington, DC, United States | 11-50 | Exact match | 70 contacts → |
“Investigative Group International (IGI) is the premier investigative firm conducting independent, high-touch investigations worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Claims Bureau USAclaimsbureau.com HQ: Woburn, MA, United StatesReported employees: 201-500 | Woburn, MA, United States | 201-500 | Exact match | 66 contacts → |
“Claims Bureau USA has been providing Insurers, TPA's and their defense counsel with quality, in-depth investigative services since 1956.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Apex Investigationapexpi.com HQ: Sacramento, CA, United StatesReported employees: 51-200 | Sacramento, CA, United States | 51-200 | Exact match | 65 contacts → |
“Today’s professionals rely on investigative firms to help manage risk by detecting and preempting problem situations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Smith & Carsonsmithcarson.com HQ: Alpharetta, NJ, United StatesReported employees: 51-200 | Alpharetta, NJ, United States | 51-200 | Exact match | 65 contacts → |
“Founded in 1978, Smith & Carson is a trusted and highly experienced investigative research firm that partners with the world's leading organizations to handle complex…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Roman & Associatesromansearch.com HQ: Uniondale, NY, United StatesReported employees: 51-200 | Uniondale, NY, United States | 51-200 | Exact match | 57 contacts → |
“For over 30 years, Roman & Associates has been a prominent and full-service Investigations & Risk Management firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Stewart & Associates INCbwstewart.com HQ: Freeport, IL, United StatesReported employees: 201-500 | Freeport, IL, United States | 201-500 | Exact match | 57 contacts → |
“Stewart & Associates was founded in 1987 by Brian W.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Tracerstracers.com HQ: Brooksville, FL, United StatesReported employees: 51-200 | Brooksville, FL, United States | 51-200 | Exact match | 51 contacts → |
“Founded in 1996, Tracers empowers attorneys, law enforcement, private investigators, collection professionals, fraud prevention specialists, and the background screening industry…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Data Quest LTDdataquestltd.com HQ: New Bedford, NY, United StatesReported employees: 11-50 | New Bedford, NY, United States | 11-50 | Exact match | 50 contacts → |
“Established in 1981, Data Quest, Ltd.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,831 company matches
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Private investigation services: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,819 records in the displayed employee bands.
12 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,831 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Private investigation services by metro
Questions about this company list
What does Exact match mean for private investigation services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many private investigation services did RevenueBase find based in the United States?
The saved snapshot records 1,831 matching company records, 11,163 tracked contacts and 2,605 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
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Cite this list
RevenueBase Data Team. Top 25 private investigation services based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/private-investigation-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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