Company lists · Data refreshed September 2026

Top 25 Iso audit consulting companies based in the United States

RevenueBase identified 1,331 company matches for iso audit consulting companies associated with the United States as of September 2026 and tracks 28,171 professional contacts across them, including 10,456 with verified work emails. Houston is the largest hub.

This list covers company matches for iso audit consulting companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
1,331Companies
28,171Contacts tracked
10,456Verified emails
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The 25 largest iso audit consulting companies based in the United States

Ranked by team size
Top 25 of 1,331 company matches for iso audit consulting companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchNorthbrook, IL, United StatesHQ recorded Sep 28, 202610001+12,316 contacts →

Exact match

“A global leader in applied safety science, UL Solutions (NYSE: ULS) transforms safety, security and sustainability challenges into opportunities for customers in more than 110…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchMarietta, GA, United StatesHQ recorded Sep 28, 20261,001-5,000890 contacts →

Exact match

“Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchTampa, FL, United StatesHQ recorded Sep 28, 2026501-1,000798 contacts →

Exact match

“A-LIGN is the leading provider of high-quality, efficient cybersecurity compliance programs.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchBoxborough, MA, United StatesHQ recorded Sep 28, 2026501-1,000712 contacts →

Exact match

“TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchSan Jose, CA, United StatesHQ recorded Sep 28, 2026501-1,000675 contacts →

Exact match

“Uniqus Consultech is an AI and global tech-enabled consulting company that specializes in Accounting & Reporting Consulting, Governance, Risk & Compliance, Sustainability &…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchTampa, FL, United StatesHQ recorded Sep 28, 2026501-1,000516 contacts →

Exact match

“Schellman is a leading provider of attestation and compliance services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Sep 28, 20261,001-5,000492 contacts →

Exact match

“Welcome to SOCOTEC in the US, Trusted Expertise, From the Ground Up.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchFairfax, VA, United StatesHQ recorded Sep 28, 2026201-500411 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchTX, United StatesHQ recorded Sep 28, 2026501-1,000347 contacts →

Exact match

“Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchCarlsbad, CA, United StatesHQ recorded Sep 28, 2026201-500266 contacts →

Exact match

“Vaisesika Consulting is a global tech and consulting firm that helps businesses transform their digital setups and stay compliant in a straightforward way.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchArlington Heights, IL, United StatesHQ recorded Sep 28, 202610001+241 contacts →

Exact match

“Market Access.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchAnn Arbor, MI, United StatesHQ recorded Sep 28, 2026501-1,000216 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchMchenry, IL, United StatesHQ recorded Sep 28, 2026501-1,000211 contacts →

Exact match

“Pro QC International provides tailored quality solutions with a human touch in 100 countries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchWestbury, NY, United StatesHQ recorded Sep 28, 202651-200179 contacts →

Exact match

“Quality & Compliance | Regulatory Strategy | Inspection Readiness & Remediation | Data Integrity.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchTampa, FL, United StatesHQ recorded Sep 28, 2026201-500174 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchFairfield, NJ, United StatesHQ recorded Sep 28, 2026201-500165 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchDeer Park, TX, United StatesHQ recorded Sep 28, 20261,001-5,000149 contacts →

Exact match

“QualSpec is a leading industrial inspection firm headquartered in Houston, Texas.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchWilmington, DE, United StatesHQ recorded Sep 28, 20261,001-5,000124 contacts →

Exact match

“As a leader in professional services, MSR Technology Group ignites growth for businesses across diverse industries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchWatertown, MA, United StatesHQ recorded Sep 28, 2026501-1,000120 contacts →

Exact match

“RoyalCert is one of the fastest-growing certification bodies, with an international presence in more than 30 countries that is constantly expanding.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchAlexandria, VA, United StatesHQ recorded Sep 28, 2026n/a113 contacts →

Exact match

“Strategic Security is an IT Security consulting firm that provides in-depth technical security assessments of your network, web application, and regulatory compliance gap analysis…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchChicago, IL, United StatesHQ recorded Sep 28, 202651-200102 contacts →

Exact match

“R&M is a boutique consulting firm that works in two key areas: tax and internal audit.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchSanta Cruz, CA, United StatesHQ recorded Sep 28, 202651-20091 contacts →

Exact match

“ISSI is a consulting, auditing and marketing services company, providing services to the world's largest hyperscale cloud platform providers and IT companies.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchThe Woodlands, TX, United StatesHQ recorded Sep 28, 202651-20085 contacts →

Exact match

“INTERCERT is a multinational auditing company headquartered in Texas, United States operating at 28+ countries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchSt. Louis Park, United StatesHQ recorded Sep 28, 202651-20082 contacts →

Exact match

“SWAT is a leading QA company in the technology industry.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchDayton, OH, United StatesHQ recorded Sep 28, 202611-5080 contacts →

Exact match

“Since 1994, EAGLE has built an excellent reputation by providing third party auditing services that are objective and value-added.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 1,331 iso audit consulting companies based in the United States

See the full list, filter by size, metro and specialty, and access 10,456 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Iso audit consulting companies based in the United States at a glance

As of Sep 28, 2026
37.1%Verified-email coverage
21.2Average contacts per company
1-10Median size (employees)
4.5%Largest-city concentration · Houston
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
896
11-50
307
51-200
75
201-500
21
501-1,000
13
1,001-5,000
9
5,001-10,000
3
10001+
4

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 1,331 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “iso audit consulting companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 10,456 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “iso audit consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many iso audit consulting companies are there based in the United States?

RevenueBase identified 1,331 company matches for iso audit consulting companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

UL Solutions tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most iso audit consulting companies?

Houston leads with 60 company records, followed by New York (30) and Los Angeles (25).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 10,456 professional contacts with verified work emails tracked across these 1,331 companies; direct dials are available where recorded.

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 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.