Company lists · Data refreshed September 2026

Top 25 Compliance and IT audit firms based in the United States

Name: Compliance and IT 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 1,637 companies tracked

RevenueBase identified 1,637 compliance and IT audit firms headquartered in the United States as of September 2026 and tracks 18,867 professional contacts across them, including 8,788 with verified work emails. New York is the largest hub.

This list covers compliance and IT 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

1,637Companies

18,867Contacts tracked

8,788Verified emails

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

Ranked by team size

Top 25 of 1,637 compliance and IT 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 IT 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	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
3	Schellman	Partial evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	501-1,000	516 contacts →
	Partial evidence “Schellman is a leading provider of attestation and compliance services.” Source: RevenueBase Database · checked Sep 19, 2026
4	Controlcase	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 19, 2026	201-500	411 contacts →
	Strong 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
5	APA Engineering INC	Strong evidence	Mount Laurel, NJ, United StatesHQ checked Sep 19, 2026	201-500	364 contacts →
	Strong 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
6	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
7	MCO Mycomplianceoffice	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	295 contacts →
	Strong 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
8	Prescient Security	Strong evidence	Nashville, TN, United StatesHQ checked Sep 19, 2026	201-500	272 contacts →
	Strong evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 19, 2026
9	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
10	Vaisesika	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 19, 2026	201-500	266 contacts →
	Partial evidence “Vaisesika Consulting is a global tech and consulting firm that helps businesses transform their digital setups and stay compliant in a straightforward way.” Source: RevenueBase Database · checked Sep 19, 2026
11	Baxter Clewis Cybersecurity	Indirect evidence	Cedar Hill, TX, United StatesHQ checked Sep 19, 2026	201-500	255 contacts →
	Indirect evidence “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Source: RevenueBase Database · checked Sep 19, 2026
12	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
13	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
14	Mindpoint Group, A Quantum SKY Company	Indirect evidence	Reston, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	204 contacts →
	Indirect evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 19, 2026
15	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
16	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
17	Ntirety	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	167 contacts →
	Indirect evidence “11:11 Systems is a managed infrastructure solutions provider that empowers customers to modernize, protect, and manage mission-critical applications and data, leveraging 11:11’s…” Source: RevenueBase Database · checked Sep 19, 2026
18	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
19	Harbor Compliance	Strong evidence	Lancaster, PA, United StatesHQ checked Sep 19, 2026	201-500	150 contacts →
	Strong evidence “We provide innovative compliance solutions by embracing complexity and making it simple.” Source: RevenueBase Database · checked Sep 19, 2026
20	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
21	Kirkpatrickprice	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 19, 2026	51-200	139 contacts →
	Indirect evidence “KirkpatrickPrice is a licensed information security CPA firm, a PCI QSA, and a HITRUST CSF Assessor, providing assurance services to over clients worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
22	Castro & Company	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 19, 2026	51-200	135 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 19, 2026
23	Cotton	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 19, 2026	201-500	134 contacts →
	Partial evidence “Cotton is an audit and accounting firm located in Old Town Alexandria, VA.” Source: RevenueBase Database · checked Sep 19, 2026
24	Charles IT	Strong evidence	Middletown, CT, United StatesHQ checked Sep 19, 2026	51-200	132 contacts →
	Strong evidence “Charles IT is the Northeast's compliance expert.” Source: RevenueBase Database · checked Sep 19, 2026
25	Edgile	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	51-200	119 contacts →
	Indirect evidence “Edgile was founded in 2001 to deliver strategic cybersecurity and risk management services to the Fortune 500.” 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 IT 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 IT audit firms.
Partial evidence: Its own public description names part of compliance and IT 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 IT 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 1,637 compliance and IT audit firms based in the United States

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

As of Sep 19, 2026

46.6%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,071

11-50

428

51-200

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 1,637 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 IT 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 IT 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 IT 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 IT 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, 8,788 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 IT 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 IT 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 IT audit firms are there based in the United States?

RevenueBase identified 1,637 compliance and IT 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 IT audit firms?

New York leads with 87 headquartered companies, followed by Atlanta (43) and Houston (41).

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 8,788 verified decision-maker contacts tracked across these 1,637 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.