Company lists · Data refreshed September 2026

Top 25 Investigative consulting firms based in Chicago, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 71 companies tracked

RevenueBase identified 71 investigative consulting firms headquartered in Chicago, United States as of September 2026 and tracks 1,388 professional contacts across them, including 507 with verified work emails. Across the United States, New York is the largest hub for this category (156 companies); Chicago has 71.

This list covers investigative consulting firms headquartered in Chicago, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

71Companies

1,388Contacts tracked

507Verified emails

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

Ranked by team size

Top 25 of 71 investigative consulting firms based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to investigative consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Envista Forensics	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	376 contacts →
	Partial evidence “Envista Forensics is the global leader in providing comprehensive forensic consulting and engineering services.” Source: RevenueBase Database · checked Sep 28, 2026
2	Ocean Tomo, A Part Of J.S. Held	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	87 contacts →
	Partial evidence “Established in 2003, Ocean Tomo, LLC provides Financial Expert, Management Consulting, and Advisory services related to intellectual property (IP) and other intangible assets…” Source: RevenueBase Database · checked Sep 28, 2026
3	Coherent Economics	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	47 contacts →
	Partial evidence “Coherent Economics is a boutique law and economics consulting firm providing world-class advisory services, data analysis, litigation support, and expert testimony to clients…” Source: RevenueBase Database · checked Sep 28, 2026
4	Willamette Management Associates	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	38 contacts →
	Indirect evidence “Willamette Management Associates is recognized as a thought leader in the field of business valuation, forensic analysis, and financial opinion services.” Source: RevenueBase Database · checked Sep 28, 2026
5	Navigant Consulting INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	n/a	38 contacts →
	Indirect evidence “At Navigant, we help you take control of your future.” Source: RevenueBase Database · checked Sep 28, 2026
6	The Claro Group	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	37 contacts →
	Strong evidence “The Claro Group is a strategic and financial consulting firm focused on providing clear, value-added professional services in the areas of disputes, claims, and investigations and…” Source: RevenueBase Database · checked Sep 28, 2026
7	Arms Security Corporation	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	27 contacts →
	Partial evidence “Trusted protection and investigative services with a commitment to excellence.” Source: RevenueBase Database · checked Sep 28, 2026
8	Inner Valor, INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	12 contacts →
	Partial evidence “Inner Valor is a premier provider of White Glove Security℠ and corporate investigation services, offering elite and personalized solutions to protect your assets, people, and…” Source: RevenueBase Database · checked Sep 28, 2026
9	Mccarthy Byrnes	Strong evidence	Chicago, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong evidence “Security Consulting \| Private Investigations \| Law Enforcement Consulting \| McCarthy Byrnes is a trusted security, investigations, and public safety advisory firm providing…” Source: RevenueBase Database · checked Sep 28, 2026
10	Crosscheck Compliance LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	9 contacts →
	Partial evidence “CrossCheck Compliance LLC is a nationwide regulatory compliance and risk management consulting firm focused on providing regulatory compliance, internal audit, fair lending, loan…” Source: RevenueBase Database · checked Sep 28, 2026
11	221b Partners	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Founded by professionals with decades of diverse experience conducting complex multi-jurisdictional investigations, 221B Partners finds the dots and connects them.” Source: RevenueBase Database · checked Sep 28, 2026
12	Axium Consulting	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Axium assists clients worldwide in understanding risks and making informed decisions.” Source: RevenueBase Database · checked Sep 28, 2026
13	Redhawk Investigations & Security	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “RedHawk is a Investigations and Security Risk Management firm specializing in comprehensive, professional and discreet services to a wide variety of US based and international…” Source: RevenueBase Database · checked Sep 28, 2026
14	Greene Forensic Accounting Solutions LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “Greene Forensic Accounting Solutions LLP is a forensic accounting and consulting practice with offices in the Chicago and Las Vegas areas, allowing us to provide our clients with…” Source: RevenueBase Database · checked Sep 28, 2026
15	Troy Group, INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “Headquartered in Chicago and established in 1998, Troy Group provides investigative services specializing in due diligence investigations.” Source: RevenueBase Database · checked Sep 28, 2026
16	FOX Forensic Accounting, LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Shawn Fox started a boutique advisory firm, Fox Forensic Accounting, LLC (FFA), to provide higher quality service on legal and regulatory matters and to provide a higher return on…” Source: RevenueBase Database · checked Sep 28, 2026
17	Protek International	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Protek provides a unique perspective to address the many facets of technology and digital evidence, investigations, enterprise risk and litigation.” Source: RevenueBase Database · checked Sep 28, 2026
18	Sierra Forensic Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Headquartered in Chicago, Illinois, Sierra Forensic Group (SFG) is a boutique forensic accounting firm specializing in assisting clients with matters involving global compliance…” Source: RevenueBase Database · checked Sep 28, 2026
19	Teamwerks	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “TeamWerks is an IT company based in the United States.” Source: RevenueBase Database · checked Sep 28, 2026
20	Ablin LAW PC Workplace Investigations	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Ablin Law specializes in providing employers and law firms with expert, professional and confidential workplace investigation solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Gould & Pakter Associates, LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “G&P is a certified public accounting firm that, among other services, provides financial forensics, commercial litigation services, internal investigations and financial analysis…” Source: RevenueBase Database · checked Sep 28, 2026
22	AM Legal Services, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
23	Brand Riffs	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “From tactical testing of marketing, to more strategic, multi-phase innovation and brand building assignments, Brand Riffs uses proven research tools and proprietary techniques to…” Source: RevenueBase Database · checked Sep 28, 2026
24	On Q Professional Investigations	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “On Q Professional Investigations (ONQPI) is a licensed Illinois Private Detective Agency, founded by former United States Department of Homeland Security-ICE Agent, Tony Quintana.” Source: RevenueBase Database · checked Sep 28, 2026
25	Optis Partners, LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “OPTIS Partners is an investment banking and consulting firm based in Chicago, IL made up of a small group of highly skilled insurance and finance professionals with extensive…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: investigative consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names investigative consulting firms.
Partial evidence: Its own public description names part of investigative consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigative consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 71 investigative consulting firms based in Chicago, United States

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

As of Sep 28, 2026

36.5%Verified-email coverage

19.5Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 71 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among investigative consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Chicago, United States whose own description of what they do matches “investigative consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names investigative consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among investigative consulting firms, and records with no verified work email. Companies headquartered outside Chicago are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 507 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Investigative consulting firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names investigative consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 71 investigative consulting firms headquartered in Chicago, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Envista Forensics, headquartered in Chicago, tops this list with the largest team on record.

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

New York leads the United States with 156 headquartered companies, followed by Houston (78) and Washington (73). Chicago has 71.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 507 verified decision-maker contacts tracked across these 71 companies.

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 Smart Search, 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.