Company lists · Data refreshed September 2026

Top 25 Investigative consulting firms based in Washington, United States

Name: Investigative consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 73 companies tracked

RevenueBase identified 73 company matches for investigative consulting firms associated with Washington, United States as of September 2026 and tracks 707 professional contacts across them, including 228 with verified work emails. Across the United States, New York is the largest hub for this category (163 companies); Washington has 73.

This list covers company matches for investigative consulting firms associated with Washington, 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 28, 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 28, 2026 How this list was built

73Companies

707Contacts tracked

228Verified emails

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The 25 largest investigative consulting firms based in Washington, United States

Ranked by team size

Top 25 of 73 company matches for investigative consulting firms based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	PSA	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	142 contacts →
	Exact match “PSA is a global due diligence and investigations firm headquartered in Washington, DC.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Investigative Group International	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	66 contacts →
	Exact match “Investigative Group International (IGI) is the premier investigative firm conducting independent, high-touch investigations worldwide.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Colorado Security Agency	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	63 contacts →
	Exact match “Established in 1974, Colorado Security Agency (CSA) is a professional security provider based in Georgetown Washington DC.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Idiscovery Solutions	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	58 contacts →
	Exact match “iDS is a strategic consulting, technology, and expert services firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Global Security And Innovative Strategies Gsis	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	37 contacts →
	Exact match “Global Security & Innovative Strategies (GSIS) leverages its extensive private sector, homeland, public security, public sector and international expertise to provide…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Economists Incorporated	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	35 contacts →
	Exact match “Secretariat Economists is a premier economic consulting firm in the fields of law and economics, public policy, and business strategy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	GBAO	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	23 contacts →
	Exact match “Our firm offers broad expertise in survey research and strategic consulting in corporate communications, branding strategy, international relations, and political campaigns at all…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Secretariat Economists	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	201-500	21 contacts →
	Exact match “Secretariat Economists provides industry-leading expert testimony and consulting services in high-stakes engagements across numerous areas of expertise, including M&A, antitrust…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Avascent	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	20 contacts →
	Exact match “Avascent is the leading management consulting firm specializing in serving senior executives in the defense, aerospace, healthcare, homeland security, logistics, technical…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Victory SIX Advisors	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	20 contacts →
	Exact match “Victory Six provides industry leaders an unbiased, independent lens, pulling from a wealth of experts with distinguished industry and government backgrounds.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Payne Enterprises, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	15 contacts →
	Exact match “Payne Enterprises offers high-quality strategic insights for a fraction of the cost of large, traditional management consulting firms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	The Kenrich Group LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	14 contacts →
	Exact match “The Kenrich Group, an HKA Company, is a business and litigation consulting firm with 50 offices in 19 countries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Dinolt Becnel & Wells Investigative Group LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	10 contacts →
	Exact match “Dinolt Becnel & Wells Investigative Group is a Washington, D.C.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Deck Prism, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	10 contacts →
	Exact match “Deck Prism LLC.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Greenberg Corporate Intelligence LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	8 contacts →
	Exact match “Greenberg Corporate Intelligence offers premium intelligence services that support attorneys, private equity firms, hedge funds, and compliance teams.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Emissary LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	8 contacts →
	Exact match “At emissary, we know that maximizing your corporate investment starts with hiring the right talent.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Brooks Bawden Moore, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	7 contacts →
	Exact match “Brooks Bawden Moore, LLC provides consulting services to help corporate, non-profit and government clients enhance public safety and security and support the criminal justice…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Credibility International, An HKA Company	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	6 contacts →
	Exact match “Our professionals have focused our careers upon becoming functionally excellent in the fields of accounting and finance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Taylor Research Group	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	6 contacts →
	Exact match “Taylor Research Group is a litigation and environmental research company with extensive experience in providing historical, investigative, and analytical research services and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Forward Risk	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	6 contacts →
	Exact match “Forward Global conducts investigative due diligence, business intelligence research, and international risk assessments for financial institutions, corporations, and law firms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Securities Litigation Analysts, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	5 contacts →
	Exact match “For over 40 years, SLA principals have provided quantitative securities analysis and investor suitability and supervision analysis to clients involved in arbitrations, regulatory…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Smith Brandon International, A Kreller Company	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “What We Do: We provide CFOs, corporate security directors, and business professionals with investigative services, consultations, and risk assessments to help our clients make the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Precision Economics, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	4 contacts →
	Exact match “Precision Economics was founded in 2001 with one goal in mind-to become one of the leading economic expert witness companies around the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	XK Group	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “XK Group provides advisory services Due Diligence Security Assessments Competitive Intelligence Background Investigations Crisis Management Insider Threat Analysis Fraud…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Mantid International LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “MANTID INTERNATIONAL LLC is a compliance and business intelligence consulting firm.” Recorded in the RevenueBase company graph · Sep 28, 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 “investigative consulting firms”. 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 73 investigative consulting firms based in Washington, United States

See the full list, filter by size, metro and specialty, and access 228 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Investigative consulting firms based in Washington, United States at a glance

As of Sep 28, 2026

32.2%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 73 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 Washington, United States whose business descriptions match “investigative consulting firms” 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 228 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 28, 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 consulting firms by metro in the United States

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 consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many investigative consulting firms are there based in Washington, United States?

RevenueBase identified 73 company matches for investigative consulting firms associated with Washington, 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?

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

Which city in the United States has the most investigative consulting firms?

New York leads the United States with 163 company records, followed by Houston (78) and Washington (73).

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 228 professional contacts with verified work emails tracked across these 73 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 28, 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.