Company lists · Data refreshed September 2026

Top 25 Quality validation services based in the United States

Name: Quality validation services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 439 companies tracked

RevenueBase identified 439 quality validation services headquartered in the United States as of September 2026 and tracks 11,381 professional contacts across them, including 4,314 with verified work emails. San Diego is the largest hub.

This list covers quality validation services 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 21, 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 21, 2026 86% judged on-target in blind review

439Companies

11,381Contacts tracked

4,314Verified emails

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The 25 largest quality validation services based in the United States

Ranked by team size

Top 25 of 439 quality validation services based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to quality validation services: 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	Nelson Labs	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 21, 2026	501-1,000	775 contacts →
	Indirect evidence “Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.” Source: RevenueBase Database · checked Sep 21, 2026
2	TÜV Rheinland North America	Indirect evidence	Boxborough, MA, United StatesHQ checked Sep 21, 2026	501-1,000	712 contacts →
	Indirect evidence “TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.” Source: RevenueBase Database · checked Sep 21, 2026
3	IEH Laboratories And Consulting Group	Indirect evidence	Lake Forest Park, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	651 contacts →
	Indirect evidence “IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Source: RevenueBase Database · checked Sep 21, 2026
4	Microbac Laboratories, INC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 21, 2026	501-1,000	494 contacts →
	Partial evidence “Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Source: RevenueBase Database · checked Sep 21, 2026
5	Food Safety NET Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	501-1,000	451 contacts →
	Indirect evidence “As part of Certified Group, Food Safety Net Services (FSNS) and Certified Laboratories partner with customers to deliver innovative scientific solutions and expertise – So The…” Source: RevenueBase Database · checked Sep 21, 2026
6	NSF	Indirect evidence	Ann Arbor, MI, United StatesHQ checked Sep 21, 2026	501-1,000	390 contacts →
	Indirect evidence “NSF is the leading global certifier of Global Food Safety Initiative (GFSI) benchmarked certifications.” Source: RevenueBase Database · checked Sep 21, 2026
7	Technical Safety Services	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	501-1,000	386 contacts →
	Indirect evidence “Technical Safety Services is a leading compliance, calibration and certification service provider for laboratories, hospitals, and pharmacies with locations across the United…” Source: RevenueBase Database · checked Sep 21, 2026
8	Registrar Corp	Indirect evidence	Hampton, VA, United StatesHQ checked Sep 21, 2026	51-200	317 contacts →
	Indirect evidence “Registrar Corp is your trusted partner helping you navigate global regulatory requirements with expert services, innovative software solutions and comprehensive online compliance…” Source: RevenueBase Database · checked Sep 21, 2026
9	Atl, A Bureau Veritas Company	Indirect evidence	Milford, OH, United StatesHQ checked Sep 21, 2026	501-1,000	314 contacts →
	Indirect evidence “Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Source: RevenueBase Database · checked Sep 21, 2026
10	Smithers	Indirect evidence	Akron, OH, United StatesHQ checked Sep 21, 2026	501-1,000	310 contacts →
	Indirect evidence “Founded in 1925 and headquartered in Akron, Ohio, Smithers is a multinational provider of testing, consulting, information, and certification services.” Source: RevenueBase Database · checked Sep 21, 2026
11	Certified Laboratories, INC	Indirect evidence	Melville, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	287 contacts →
	Indirect evidence “As part of Certified Group, Certified Laboratories partners with customers to deliver innovative scientific solutions and expertise – So The World Can Trust In What It Consumes™.” Source: RevenueBase Database · checked Sep 21, 2026
12	ARL BIO Pharma	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 21, 2026	201-500	286 contacts →
	Indirect evidence “ARL Bio Pharma is a contract laboratory that provides analytical and microbiological testing for the pharmaceutical industry.” Source: RevenueBase Database · checked Sep 21, 2026
13	BA Sciences	Partial evidence	Salem, NH, United StatesHQ checked Sep 21, 2026	201-500	257 contacts →
	Partial evidence “Since its founding in 1987, BA Sciences has been a trusted provider of high-quality analytical testing services to life science companies worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
14	Valsource INC	Indirect evidence	Downingtown, PA, United StatesHQ checked Sep 21, 2026	201-500	245 contacts →
	Indirect evidence “Since 1996, ValSource has worked with hundreds of pharmaceutical, biopharma, and medical device organizations around the world.” Source: RevenueBase Database · checked Sep 21, 2026
15	Deibel Laboratories	Indirect evidence	Niles, IL, United StatesHQ checked Sep 21, 2026	201-500	242 contacts →
	Indirect evidence “Deibel Laboratories started in 1967 by Dr.” Source: RevenueBase Database · checked Sep 21, 2026
16	PRO QC International	Partial evidence	Mchenry, IL, United StatesHQ checked Sep 21, 2026	501-1,000	211 contacts →
	Partial evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 21, 2026
17	Certified Group	Indirect evidence	Melville, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	206 contacts →
	Indirect evidence “Certified Group partners with customers to deliver innovative scientific solutions and expertise – So The World Can Trust In What It Consumes®.” Source: RevenueBase Database · checked Sep 21, 2026
18	ECI	Partial evidence	Marlborough, MA, United StatesHQ checked Sep 21, 2026	201-500	194 contacts →
	Partial evidence “Enhanced Compliance Inc.(ECI) is a global life sciences partner delivering integrated quality, regulatory, and compliance expertise-combined with hands-on engineering execution…” Source: RevenueBase Database · checked Sep 21, 2026
19	Lachman Consultant Services	Partial evidence	Westbury, NY, United StatesHQ checked Sep 21, 2026	51-200	179 contacts →
	Partial evidence “Quality & Compliance \| Regulatory Strategy \| Inspection Readiness & Remediation \| Data Integrity.” Source: RevenueBase Database · checked Sep 21, 2026
20	Quality Chemical Laboratories	Partial evidence	Wilmington, NC, United StatesHQ checked Sep 21, 2026	201-500	177 contacts →
	Partial evidence “QCL is science driven, quality focused, and responsive.” Source: RevenueBase Database · checked Sep 21, 2026
21	Matrix Sciences	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	201-500	175 contacts →
	Indirect evidence “Matrix Sciences partners with the agri-food industry to deliver science-based solutions that support confident decision-making across the supply chain from Cultivation to…” Source: RevenueBase Database · checked Sep 21, 2026
22	Performance Validation	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 21, 2026	51-200	167 contacts →
	Partial evidence “Performance Validation (PV) is a global validation partner for pharmaceutical and medical device manufacturers.” Source: RevenueBase Database · checked Sep 21, 2026
23	Q Laboratories	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 2026	51-200	162 contacts →
	Indirect evidence “Q Laboratories is an FDA/MoCRA registered (#1527260), cGMP/GLP compliant, and ISO/IEC 17025 accredited contract laboratory supporting global brands in delivering safe…” Source: RevenueBase Database · checked Sep 21, 2026
24	Pacific Biolabs, INC	Indirect evidence	Hercules, CA, United StatesHQ checked Sep 21, 2026	51-200	120 contacts →
	Indirect evidence “Pacific BioLabs is the leading West Coast provider of GMP/GLP laboratory testing services supporting Medical Device, Pharmaceutical, and Biotechnology industries.” Source: RevenueBase Database · checked Sep 21, 2026
25	Total Validation Services	Strong evidence	Moraga, CA, United StatesHQ checked Sep 21, 2026	11-50	120 contacts →
	Strong evidence “Total Validation Services (TVS) is an industry leader in delivering practical and cost-effective commissioning, qualification, and validation solutions, in addition to project…” Source: RevenueBase Database · checked Sep 21, 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: quality validation services. 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 quality validation services.
Partial evidence: Its own public description names part of quality validation services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality validation services. 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 439 quality validation services based in the United States

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Quality validation services based in the United States at a glance

As of Sep 21, 2026

37.9%Verified-email coverage

25.9Average contacts per company

1-10Median size (employees)

2.7%Largest-city concentration · San Diego

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

235

11-50

124

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 439 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 quality validation services, 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 “quality validation services”. 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 quality validation services), 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 quality validation services, 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, 4,314 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 21, 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.

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 quality validation services, 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 quality validation services are there based in the United States?

RevenueBase identified 439 quality validation services 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?

Nelson Labs, headquartered in Salt Lake City, tops this list with the largest team on record.

Which city has the most quality validation services?

San Diego leads with 12 headquartered companies, followed by Houston (9) and Wilmington (8).

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 4,314 verified decision-maker contacts tracked across these 439 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 21, 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.