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Company lists · Data refreshed September 2026

Top 25 Internal audit consulting firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 1,135 companies tracked

RevenueBase identified 1,135 internal audit consulting firms headquartered in the United States as of September 2026 and tracks 22,101 professional contacts across them, including 10,103 with verified work emails and 10,021 with mobile numbers. New York is the largest hub.

This list covers internal audit 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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 HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review
1,135Companies
22,101Contacts tracked
10,103Verified emails
10,021Mobile numbers
Unlock all 1,135 companies Free signup · no credit card · 500 free credits

The 25 largest internal audit consulting firms based in the United States

Ranked by team size
Top 25 of 1,135 internal audit consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names internal audit consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
SikichPartial evidence
Chicago, TN, United StatesHQ checked Sep 4, 20261,001-5,0001,702

“Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.”

Source: company website · checked Sep 4, 2026
2
Bennett ThrasherPartial evidence
Atlanta, CO, United StatesHQ checked Sep 4, 2026201-500546

“Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.”

Source: company website · checked Sep 4, 2026
3
Prager Metis CpasPartial evidence
New York, United StatesHQ checked Sep 4, 2026201-500471

“Prager Metis CPAs is an independent, full service, public accounting and consulting firm.”

Source: company website · checked Sep 4, 2026
4
Clark Nuber PSIndirect evidence
Bellevue, WA, United StatesHQ checked Sep 4, 2026201-500353

“Clark Nuber is an award-winning Certified Public Accounting firm located in the Seattle Metro Area.”

Source: company website · checked Sep 4, 2026
5
Johnson Lambert LLPIndirect evidence
Vienna, NC, United StatesHQ checked Sep 4, 2026201-500328
Source: company website · checked Sep 4, 2026
6
SVA A Professional Services CompanyIndirect evidence
Madison, AZ, United StatesHQ checked Sep 4, 2026201-500321

“Listed below are the two entities that make up SVA, a highly diversified, independent professional services firm.”

Source: company website · checked Sep 4, 2026
7
LarsonallenIndirect evidence
Minneapolis, MN, United StatesHQ checked Sep 4, 20261,001-5,000287

“Effective January 2, 2012, LarsonAllen and Clifton Gunderson are now CliftonLarsonAllen.”

Source: company website · checked Sep 4, 2026
8
Clifton Gunderson LLPPartial evidence
Milwaukee, IL, United StatesHQ checked Sep 4, 20261,001-5,000272

“Clifton Gunderson is ranked as one of the nation’s largest certified public accounting and consulting firms.”

Source: company website · checked Sep 4, 2026
9
GRF Cpas & AdvisorsPartial evidence
North Bethesda, MD, United StatesHQ checked Sep 4, 202651-200243

“Headquartered in the Washington, DC metropolitan region, GRF CPAs & Advisors (GRF) is a full-service professional services firm providing clients with audit and assurance, tax…”

Source: company website · checked Sep 4, 2026
10
Armanino LLPPartial evidence
San Ramon, CA, United StatesHQ checked Sep 4, 20261,001-5,000214

“Armanino LLP is a Top 20 CPA & Consulting firm in the nation, one of the "Best of the Best" accounting firms and a Best Places to Work, both nationally and regionally.”

Source: company website · checked Sep 4, 2026
11
Harding, Shymanski & Company, P.S.CIndirect evidence
Evansville, KY, United StatesHQ checked Sep 4, 202651-200198
Source: company website · checked Sep 4, 2026
12
CentriPartial evidence
Philadelphia, NY, United StatesHQ checked Sep 4, 2026201-500190

“Centri Business Consulting provides the highest quality advisory consulting services to its clients by being reliable and responsive to their needs.”

Source: company website · checked Sep 4, 2026
13
Hannis T. Bourgeois, LLPIndirect evidence
Baton Rouge, LA, United StatesHQ checked Sep 4, 202651-200188

“Established in 1924, Hannis T.”

Source: company website · checked Sep 4, 2026
14
Hutchinson And Bloodgood LLPPartial evidence
Glendale, CA, United StatesHQ checked Sep 4, 202651-200185

“Hutchinson and Bloodgood LLP is a leading firm of Certified Public Accountants and Consultants providing Tax Planning, Auditing, Technology Consulting, Human Resources and…”

Source: company website · checked Sep 4, 2026
15
THF Thomas Howell FergusonIndirect evidence
Tallahassee, GA, United StatesHQ checked Sep 4, 202651-200169

“Thomas Howell Ferguson P.A.”

Source: company website · checked Sep 4, 2026
16
Dla, LLCIndirect evidence
Fairfield, NY, United StatesHQ checked Sep 4, 2026201-500161

“DLA, LLC is a leading consultancy firm that provides a wide range of specialized services designed to optimize business operations and drive sustainable growth.”

Source: company website · checked Sep 4, 2026
17
Mckonly & AsburyIndirect evidence
Camp Hill, PA, United StatesHQ checked Sep 4, 202651-200157

“At McKonly & Asbury, the philosophy of Helping Others Thrive has been the driving force behind the success of our team, clients, and communities since being founded in 1973.”

Source: company website · checked Sep 4, 2026
18
Efpr, A Springline CompanyPartial evidence
Rochester, NY, United StatesHQ checked Sep 4, 202651-200154

“EFPR, a Springline company, is one of Western New York’s largest accounting and business consulting firms serving clients across the United States and around the globe.”

Source: company website · checked Sep 4, 2026
19
SB & Company, LLCStrong evidence
Owings Mills, PA, United StatesHQ checked Sep 4, 202651-200154

“SB & Company, LLC (SBC) is an audit, tax, risk consulting and business advisory firm that is an outstanding place where highly talented people help our clients succeed.”

Source: company website · checked Sep 4, 2026
20
RRBBIndirect evidence
Somerset, NJ, United StatesHQ checked Sep 4, 202651-200152

“RRBB," an independent member of the Crete Professionals Alliance, is the brand name under which Rosenberg Rich Baker Berman, P.A.”

Source: company website · checked Sep 4, 2026
21
Larson & CompanyIndirect evidence
Sandy, UT, United StatesHQ checked Sep 4, 202651-200146

“Since 1975, Larson & Company has served the insurance industry with personalized services tailored to a highly regulated industry.”

Source: company website · checked Sep 4, 2026
22
Jain & AssociatesIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 4, 2026n/a145

“The CPAs and staff accountants at Jain & Associates have an experience in both public accounting and industry.”

Source: company website · checked Sep 4, 2026
23
Castro & CompanyPartial evidence
Alexandria, VA, United StatesHQ checked Sep 4, 202651-200140

“Castro & Company is an audit, advisory, and IT services CPA Firm specializing in providing the full resources and quality expected from a larger CPA firm while not compromising in…”

Source: company website · checked Sep 4, 2026
24
St. Michael's INCIndirect evidence
Woodbridge, VA, United StatesHQ checked Sep 4, 202651-200138

“St.”

Source: company website · checked Sep 4, 2026
25
Maher DuesselStrong evidence
Pittsburgh, PA, United StatesHQ checked Sep 4, 202651-200136

“Maher Duessel is a leading regional CPA firm that was founded to provide high-caliber audit, tax, and consulting services to clients in the governmental and non-profit sectors.”

Source: company website · checked Sep 4, 2026

Showing 25 of 1,135 internal audit consulting firms based in the United States

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Internal audit consulting firms based in the United States at a glance

As of Sep 4, 2026
1-10Median size (employees)
New YorkLargest hub · 53 HQs
10,021Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
588
11-50
379
51-200
128
201-500
23
501-1,000
3
1,001-5,000
8
5,001-10,000
2
10001+
1

Verified emails by last verification

0–30
0
31–60
880
61–90
5,333
90–180
3,850
180+
40

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 internal audit consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “internal audit consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among internal audit 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 an evidence 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, 10,103 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 4, 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.

Internal audit consulting firms by metro

Frequently asked

How many internal audit consulting firms are there based in the United States?

RevenueBase identified 1,135 internal audit 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?

Sikich, headquartered in Chattanooga, tops this list with the largest team on record.

Which city has the most internal audit consulting firms?

New York leads with 53 headquartered companies, followed by Houston (30) and Chicago (27).

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 10,103 verified decision-maker contacts tracked across these 1,135 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 4, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,135 internal audit consulting firms based in the United States. Start with a free account, no credit card.

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Related lists

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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.

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