Company lists · Data refreshed September 2026

Top 25 Due diligence consulting firms based in the United States

Name: Due diligence consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 372 companies tracked

RevenueBase identified 372 due diligence consulting firms headquartered in the United States as of September 2026 and tracks 4,543 professional contacts across them, including 2,273 with verified work emails and 2,054 with mobile numbers. New York is the largest hub.

This list covers due diligence consulting firms headquartered in the 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

372Companies

4,543Contacts tracked

2,273Verified emails

2,054Mobile numbers

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The 25 largest due diligence consulting firms based in the United States

Ranked by team size

Top 25 of 372 due diligence consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to due diligence 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	Riveron	Indirect evidence	Miami, FL, United States	1,001-5,000	1,145 contacts →
	Indirect evidence “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Source: RevenueBase Database · checked Sep 1, 2026
2	Gparency	Indirect evidence	Howell, NJ, United States	n/a	241 contacts →
	Indirect evidence “We know you work hard to get the best deal possible.” Source: RevenueBase Database · checked Sep 1, 2026
3	LCG Advisors	Indirect evidence	Denver, CO, United States	51-200	177 contacts →
	Indirect evidence “Maximizing Value.” Source: RevenueBase Database · checked Sep 1, 2026
4	Investor Group Services IGS	Strong evidence	Boston, MA, United States	51-200	173 contacts →
	Strong evidence “For over 25 years, IGS has helped investors and management teams make better, faster decisions, from commercial due diligence, to growth strategy, pricing, and go-to-market…” Source: RevenueBase Database · checked Sep 1, 2026
5	Blue OPS	Strong evidence	Minneapolis, MN, United States	51-200	80 contacts →
	Strong evidence “Outside Operating Partners, Due Diligence Support and CPM Software Implementation with proven success in making our clients make more money faster.” Source: RevenueBase Database · checked Sep 1, 2026
6	Cretelligent	Strong evidence	Gold River, CA, United States	51-200	77 contacts →
	Strong evidence “CREtelligent’s Radius Platform is the world's first 24/7 "CRE Due Diligence Storefront." CREtelligent provides almost every due diligence service CRE buyers, lenders and sellers…” Source: RevenueBase Database · checked Sep 1, 2026
7	Blue Heron Research Partners	Strong evidence	New York, NY, United States	51-200	76 contacts →
	Strong evidence “Blue Heron Research Partners is an international leader in qualitative due diligence.” Source: RevenueBase Database · checked Sep 1, 2026
8	Property Solutions INC	Indirect evidence	Chicago, IL, United States	51-200	67 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 1, 2026
9	Kreller Group	Indirect evidence	Cincinnati, OH, United States	11-50	62 contacts →
	Indirect evidence “Live investigator-led analysis is the best way to minimize regulatory, reputational and financial risks.” Source: RevenueBase Database · checked Sep 1, 2026
10	LM Consultants	Indirect evidence	Seattle, WA, United States	51-200	62 contacts →
	Indirect evidence “LM Consultants, Inc.” Source: RevenueBase Database · checked Sep 1, 2026
11	Qualicentric	Indirect evidence	San Francisco, CA, United States	51-200	60 contacts →
	Indirect evidence “We’re a team of ex-Big 4 professionals, and have worked with 100+ companies over the past 10 years.” Source: RevenueBase Database · checked Sep 1, 2026
12	Apex Leaders	Indirect evidence	Boise, ID, United States	51-200	59 contacts →
	Indirect evidence “When private equity firms are faced with complex investment decisions, they turn to Apex Leaders to identify former executives and industry leaders with specific experience who…” Source: RevenueBase Database · checked Sep 1, 2026
13	Lender Consulting Services	Strong evidence	Buffalo, NY, United States	51-200	53 contacts →
	Strong evidence “Lender Consulting Services (LCS) is a nationally recognized leader in Risk Management Solutions, specializing in Environmental, Construction, and Valuation Due Diligence.” Source: RevenueBase Database · checked Sep 1, 2026
14	Ironsides Advisory	Strong evidence	Santa Monica, CA, United States	51-200	49 contacts →
	Strong evidence “Ironsides is an M&A advisory firm focused exclusively on providing transaction services including financial and accounting due diligence, tax due diligence and structuring…” Source: RevenueBase Database · checked Sep 1, 2026
15	Columbia Advisory Group	Strong evidence	Dallas, TX, United States	51-200	48 contacts →
	Strong evidence “Columbia Advisory Group is a Dallas, Texas based Information Technology consulting firm focused on providing Information Technology due diligence, strategic assessment and…” Source: RevenueBase Database · checked Sep 1, 2026
16	Floyd Advisory LLC	Partial evidence	New York, NY, United States	11-50	42 contacts →
	Partial evidence “FLOYD ADVISORY is a consulting firm providing financial and accounting expertise in areas of SEC reporting, transaction advisory, investigations and compliance, valuation and…” Source: RevenueBase Database · checked Sep 1, 2026
17	Hilton Global Associates INC	Strong evidence	San Francisco, CA, United States	51-200	42 contacts →
	Strong evidence “Hilton Global Associates is a professional investigative research firm providing expert due diligence and unparalleled client service.” Source: RevenueBase Database · checked Sep 1, 2026
18	CDS	Partial evidence	San Francisco, CA, United States	11-50	37 contacts →
	Partial evidence “CDS is now part of CrossCountry Consulting.” Source: RevenueBase Database · checked Sep 1, 2026
19	Snyder Kearney, LLC	Strong evidence	Columbia, MD, United States	11-50	27 contacts →
	Strong evidence “Our law firm combines highly specialized legal expertise with business and financial acumen, which allows us to provide our clients with focused intelligence and due diligence on…” Source: RevenueBase Database · checked Sep 1, 2026
20	Factright, LLC	Indirect evidence	Eden Prairie, United States	11-50	22 contacts →
	Indirect evidence “FactRight is the premier source of credible perspective and advice for wealth managers seeking access to alternative investments.” Source: RevenueBase Database · checked Sep 1, 2026
21	SCA Transaction Services LLC	Strong evidence	Kansas City, MO, United States	11-50	19 contacts →
	Strong evidence “SCA Transaction Services LLC provides accounting due diligence and other transaction advisory services to private equity groups, lenders and corporations.” Source: RevenueBase Database · checked Sep 1, 2026
22	Asenti Diligence Partners LLC	Indirect evidence	Corpus Christi, TX, United States	11-50	19 contacts →
	Indirect evidence “We have helped dozens of clients gain insight into critical areas of concern by thoroughly reviewing their target company’s information and asking intelligent questions.” Source: RevenueBase Database · checked Sep 1, 2026
23	Targus Associates, LLC	Strong evidence	Dallas, TX, United States	11-50	19 contacts →
	Strong evidence “Targus Associates specializes in environmental due diligence services for acquisitions and financing of commercial real estate and related consulting services.” Source: RevenueBase Database · checked Sep 1, 2026
24	GTG Consultants, INC	Indirect evidence	New York, NY, United States	11-50	18 contacts →
	Indirect evidence “Founded in 1991, GTG Consultants, Inc.” Source: RevenueBase Database · checked Sep 1, 2026
25	Moore-Mcneil	Strong evidence	Nashville, TN, United States	11-50	18 contacts →
	Strong evidence “Moore-McNeil, LLC (“Moore-McNeil”) is an insurance consulting firm with extensive experience in providing due diligence and outsourced risk management services.” Source: RevenueBase Database · checked Sep 1, 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: due diligence 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 due diligence consulting firms.
Partial evidence: Its own public description names part of due diligence consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name due diligence 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 372 due diligence consulting firms based in the United States

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Due diligence consulting firms based in the United States at a glance

As of Sep 1, 2026

50.0%Verified-email coverage

45.2%Mobile-number coverage

12.2Average contacts per company

1-10Median size (employees)

8.1%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

249

11-50

51-200

1,001-5,000

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 due diligence 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 the United States whose own description of what they do matches “due diligence 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 due diligence 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 due diligence consulting firms, and records with no verified work email. Companies headquartered outside United States 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, 2,273 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 1, 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.

Due diligence consulting firms by metro

Due diligence consulting firms in New York30

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 due diligence 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 due diligence consulting firms are there based in the United States?

RevenueBase identified 372 due diligence consulting firms headquartered in the 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?

Riveron, headquartered in Miami, tops this list with the largest team on record.

Which city has the most due diligence consulting firms?

New York leads with 30 headquartered companies, followed by Chicago (13) and Washington (12).

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 2,273 verified decision-maker contacts tracked across these 372 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 1, 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.