Company lists · Data refreshed September 2026

Top 25 Independent quality auditors based in the United States

RevenueBase identified 306 company matches for independent quality auditors associated with the United States as of September 2026 and tracks 18,287 professional contacts across them, including 6,639 with verified work emails. Houston is the largest hub.

This list covers company matches for independent quality auditors 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 20, 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 20, 2026 How this list was built
306Companies
18,287Contacts tracked
6,639Verified emails
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The 25 largest independent quality auditors based in the United States

Ranked by team size
Top 25 of 306 company matches for independent quality auditors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 20, 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 20, 2026 · View company records in RevenueBase
2Exact matchBoxborough, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
3Exact matchAkron, OH, United StatesHQ recorded Sep 20, 2026501-1,000310 contacts →

Exact match

“Founded in 1925 and headquartered in Akron, Ohio, Smithers is a multinational provider of testing, consulting, information, and certification services.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchArlington Heights, IL, United StatesHQ recorded Sep 20, 202610001+241 contacts →

Exact match

“Market Access.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchMchenry, IL, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
6Exact matchWarrendale, PA, United StatesHQ recorded Sep 20, 202651-200200 contacts →

Exact match

“Performance Review Institute® (PRI℠) is headquartered in Pittsburgh, Pennsylvania in the USA, with offices in London, UK to serve Europe and in Beijing, China and Aichi, Japan…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-200199 contacts →

Exact match

“The ANSI National Accreditation Board plays an important role in ensuring the safety and quality of goods and services and in protecting the environment.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchPeachtree City, GA, United StatesHQ recorded Sep 20, 202651-200134 contacts →

Exact match

“Timber Products Inspection, Inc.(TP) is an independent, third party wood products inspection, testing and consulting company.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchWatertown, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
10Exact matchSouth Plainfield, NJ, United StatesHQ recorded Sep 20, 2026201-500116 contacts →

Exact match

“AEIS, LLC is a testing, inspection, and certification (TIC) agency that increases quality and safety outcomes for major infrastructure.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchLas Vegas, NV, United StatesHQ recorded Sep 20, 20261,001-5,000114 contacts →

Exact match

“Certerra provides technology-enabled testing, inspection, and certification services for new product development, engineering solutions to manage assets, and quality assurance for…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchThe Woodlands, TX, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
13Exact matchDayton, OH, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
14Exact matchMilwaukee, WI, United StatesHQ recorded Sep 20, 202611-5080 contacts →

Exact match

“Exemplar Global Inc.(formerly RABQSA) is a not-for-profit organization with shared headquarters in both the United States and Australia.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 20, 2026n/a78 contacts →

Exact match

“ALS is a leading testing, inspection, certification and verification company servicing multiple industries globally.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchMinneapolis, MN, United StatesHQ recorded Sep 20, 202651-20071 contacts →

Exact match

“Plexus International is a global leader in providing training, assessment, and consulting services for organizations to attain quality management systems excellence.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchNew York, United StatesHQ recorded Sep 20, 20261,001-5,00048 contacts →

Exact match

“Alliance Infinite has consistently maintained its position among the world’s very best quality service providers for Third Party Inspection, Testing, Calibration and Management…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchSunnyvale, CA, United StatesHQ recorded Sep 20, 202611-5045 contacts →

Exact match

“Since 1996, Bay Area Compliance Laboratories Corp.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchDamascus, MD, United StatesHQ recorded Sep 20, 202611-5043 contacts →

Exact match

“F2 Labs is an accredited, full service product conformity assessment organization founded in 1991.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchMinneapolis, MN, United StatesHQ recorded Sep 20, 202611-5043 contacts →

Exact match

“Quality Auditing LLC is the industry leader in Quality Management System Auditing & Consulting for clients in highly-regulated industries, including Medical Device…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchSpring, TX, United StatesHQ recorded Sep 20, 2026n/a41 contacts →

Exact match

“ABS Quality Evaluations, Inc.(ABS QE) is a global leader in quality assurance and business improvement services with over 30 years of experience.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchDurham, NC, United StatesHQ recorded Sep 20, 202611-5040 contacts →

Exact match

“Drummond is a leading and trusted compliance, conformance, and standards certification, testing, and validation services provider.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchRockville, MD, United StatesHQ recorded Sep 20, 202651-20040 contacts →

Exact match

“We established Acumen to change how product certifications are performed.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchMoraine, OH, United StatesHQ recorded Sep 20, 202651-20034 contacts →

Exact match

“Supplier Inspection Services, Inc.(SIS, Inc.) is a quality management support services provider that partners with companies worldwide within the Automotive, Aerospace, Appliance…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchArlington, VA, United StatesHQ recorded Sep 20, 202611-5028 contacts →

Exact match

“The SQF (Safe Quality Food) Institute is a division of the FMI, the food industry association, established to administer the SQF Program, a leading, global food safety and quality…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 306 independent quality auditors based in the United States

See the full list, filter by size, metro and specialty, and access 6,639 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Independent quality auditors based in the United States at a glance

As of Sep 20, 2026
36.3%Verified-email coverage
59.8Average contacts per company
11-50Median size (employees)
5.2%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
149
11-50
93
51-200
33
201-500
15
501-1,000
7
1,001-5,000
4
5,001-10,000
1
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 306 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 “independent quality auditors” 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 6,639 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 20, 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 “independent quality auditors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many independent quality auditors are there based in the United States?

RevenueBase identified 306 company matches for independent quality auditors 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 independent quality auditors?

Houston leads with 16 company records, followed by Miami (7) and Denver (5).

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 6,639 professional contacts with verified work emails tracked across these 306 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 20, 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.