Company lists · Data refreshed September 2026

Top 25 Compliance and audit firms based in the United States

Name: Compliance and audit 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 19, 2026 1,808 companies tracked

RevenueBase identified 1,808 compliance and audit firms headquartered in the United States as of September 2026 and tracks 24,085 professional contacts across them, including 11,175 with verified work emails. New York is the largest hub.

This list covers compliance and audit 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 19, 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 19, 2026 86% judged on-target in blind review

1,808Companies

24,085Contacts tracked

11,175Verified emails

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The 25 largest compliance and audit firms based in the United States

Ranked by team size

Top 25 of 1,808 compliance and audit firms based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to compliance and audit 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	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 19, 2026
2	ACA Group	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,486 contacts →
	Partial evidence “ACA Group is the leading governance, risk, and compliance advisor to the financial services industry.” Source: RevenueBase Database · checked Sep 19, 2026
3	A-Lign	Partial evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	501-1,000	798 contacts →
	Partial evidence “A-LIGN is the leading provider of high-quality, efficient cybersecurity compliance programs.” Source: RevenueBase Database · checked Sep 19, 2026
4	CT Corporation	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	788 contacts →
	Partial evidence “CT Corporation helps small businesses, corporations, and law firms around the world manage their most critical business and legal compliance responsibilities.” Source: RevenueBase Database · checked Sep 19, 2026
5	Uniqus Consultech INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	501-1,000	675 contacts →
	Partial evidence “Uniqus Consultech is an AI and global tech-enabled consulting company that specializes in Accounting & Reporting Consulting, Governance, Risk & Compliance, Sustainability &…” Source: RevenueBase Database · checked Sep 19, 2026
6	LRN	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	661 contacts →
	Partial evidence “LRN is the world's largest dedicated ethics and compliance company, educating and helping more than 30 million people each year worldwide navigate complex legal and regulatory…” Source: RevenueBase Database · checked Sep 19, 2026
7	Solomonedwards	Indirect evidence	Wayne, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	557 contacts →
	Indirect evidence “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: RevenueBase Database · checked Sep 19, 2026
8	Aithent INC	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	416 contacts →
	Partial evidence “Aithent creates high-value regulatory compliance management solutions for financial services, government, healthcare and insurance organizations around the globe.” Source: RevenueBase Database · checked Sep 19, 2026
9	Controlcase	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 19, 2026	201-500	411 contacts →
	Partial evidence “ControlCase is committed to bringing peace of mind to the world’s IT compliance programs through our signature partnership approach, commitment to automation, and cost-effective…” Source: RevenueBase Database · checked Sep 19, 2026
10	IBM Promontory	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	501-1,000	403 contacts →
	Partial evidence “IBM Promontory is a global leader in strategy, risk management, and compliance consulting.#IBMConsulting” Source: RevenueBase Database · checked Sep 19, 2026
11	APA Engineering INC	Partial evidence	Mount Laurel, NJ, United StatesHQ checked Sep 19, 2026	201-500	364 contacts →
	Partial evidence “APA Engineering Inc has been a leader in providing Compliance, Engineering, IT, and Sourcing services since With over twenty years in business, we are dedicated to providing the…” Source: RevenueBase Database · checked Sep 19, 2026
12	Protect LLC	Partial evidence	Wichita, KS, United StatesHQ checked Sep 19, 2026	501-1,000	332 contacts →
	Partial evidence “PROtect is a leading national provider of reliability, risk, and compliance services to the refining, petrochemical, renewable fuels, manufacturing, food & beverage, fertilizer…” Source: RevenueBase Database · checked Sep 19, 2026
13	Comply	Partial evidence	New York City, NY, United StatesHQ checked Sep 19, 2026	201-500	308 contacts →
	Partial evidence “At Comply, we pride ourselves on being the champion for compliance professionals.” Source: RevenueBase Database · checked Sep 19, 2026
14	MCO Mycomplianceoffice	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	295 contacts →
	Partial evidence “MCO is a global leader on a mission to revolutionize how financial firms tackle compliance, making it simpler, smarter, and more effective.” Source: RevenueBase Database · checked Sep 19, 2026
15	Guidepost Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	268 contacts →
	Indirect evidence “We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: RevenueBase Database · checked Sep 19, 2026
16	Scrut Automation	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 19, 2026	51-200	248 contacts →
	Partial evidence “Governance, Risk, and Compliance simplified for new-age businesses.” Source: RevenueBase Database · checked Sep 19, 2026
17	Thoropass	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	243 contacts →
	Indirect evidence “Thoropass is the only end-to-end cybersecurity auditor.” Source: RevenueBase Database · checked Sep 19, 2026
18	Burwood Group	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 19, 2026	201-500	223 contacts →
	Indirect evidence “The urgent need for technology to solve business problems more efficiently, decrease costs, and mitigate risk has increased.” Source: RevenueBase Database · checked Sep 19, 2026
19	Lachman Consultant Services	Partial evidence	Westbury, NY, United StatesHQ checked Sep 19, 2026	51-200	179 contacts →
	Partial evidence “Quality & Compliance \| Regulatory Strategy \| Inspection Readiness & Remediation \| Data Integrity.” Source: RevenueBase Database · checked Sep 19, 2026
20	Insight Assurance	Partial evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	201-500	174 contacts →
	Partial evidence “Insight Assurance is a security and compliance firm trusted by more than 1,500 organizations for their SOC 1, SOC 2, SOC 3, PCI DSS, ISO 27001, ISO 27017/27018, ISO 27701, ISO…” Source: RevenueBase Database · checked Sep 19, 2026
21	Ampcus Cyber	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	170 contacts →
	Indirect evidence “Trusted By 2,880+ World-Class Brands And Organizations Of All Sizes…!” Source: RevenueBase Database · checked Sep 19, 2026
22	Dla, LLC	Indirect evidence	Fairfield, NJ, United StatesHQ checked Sep 19, 2026	201-500	165 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 19, 2026
23	SB & Company, LLC	Partial evidence	Owings Mills, MD, United StatesHQ checked Sep 19, 2026	51-200	156 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 19, 2026
24	Harbor Compliance	Partial evidence	Lancaster, PA, United StatesHQ checked Sep 19, 2026	201-500	150 contacts →
	Partial evidence “We provide innovative compliance solutions by embracing complexity and making it simple.” Source: RevenueBase Database · checked Sep 19, 2026
25	Optima Partners	Partial evidence	NY, United StatesHQ checked Sep 19, 2026	51-200	145 contacts →
	Partial evidence “Established in 2014, Optima is a leading global regulatory compliance and cybersecurity consulting firm advising financial institutions, including investment managers, hedge…” Source: RevenueBase Database · checked Sep 19, 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: compliance and audit 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 compliance and audit firms.
Partial evidence: Its own public description names part of compliance and audit firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name compliance and audit 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 1,808 compliance and audit firms based in the United States

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Compliance and audit firms based in the United States at a glance

As of Sep 19, 2026

46.4%Verified-email coverage

13.3Average contacts per company

1-10Median size (employees)

6.4%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,165

11-50

480

51-200

121

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,808 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 compliance and audit 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 “compliance and audit 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 compliance and audit 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 compliance and audit 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, 11,175 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 19, 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.

Compliance and audit firms by metro

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 compliance and audit 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 compliance and audit firms are there based in the United States?

RevenueBase identified 1,808 compliance and audit 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 Chicago, tops this list with the largest team on record.

Which city has the most compliance and audit firms?

New York leads with 115 headquartered companies, followed by Houston (48) and Atlanta (40).

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 11,175 verified decision-maker contacts tracked across these 1,808 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 19, 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.