Company lists · Data refreshed November 2026

Top 25 Api testing laboratories based in the United States

RevenueBase identified 234 company matches for api testing laboratories associated with the United States as of November 2026 and tracks 7,934 professional contacts across them, including 3,198 with verified work emails. Houston is the largest hub.

This list covers company matches for api testing laboratories 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 November 6, 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 Nov 6, 2026 How this list was built
234Companies
7,934Contacts tracked
3,198Verified emails
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The 25 largest api testing laboratories based in the United States

Ranked by team size
Top 25 of 234 company matches for api testing laboratories based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchLancaster, PA, United StatesHQ recorded Nov 6, 20261,001-5,0001,676 contacts →

Exact match

“Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMilford, OH, United StatesHQ recorded Nov 6, 2026501-1,000332 contacts →

Exact match

“Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchOklahoma City, OK, United StatesHQ recorded Nov 6, 2026201-500313 contacts →

Exact match

“ARL Bio Pharma is a contract laboratory that provides analytical and microbiological testing for the pharmaceutical industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMelville, IL, United StatesHQ recorded Nov 6, 20261,001-5,000308 contacts →

Exact match

“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™.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchNiles, WI, United StatesHQ recorded Nov 6, 2026201-500255 contacts →

Exact match

“Deibel Laboratories started in 1967 by Dr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchNorth Little Rock, NC, United StatesHQ recorded Nov 6, 2026501-1,000219 contacts →

Exact match

“Our laboratory service experts provide clients with precision testing support, innovative scientific approaches, and high-quality data that delivers a sense of certainty.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchWilmington, NC, United StatesHQ recorded Nov 6, 2026201-500190 contacts →

Exact match

“QCL is science driven, quality focused, and responsive.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchCincinnati, OH, United StatesHQ recorded Nov 6, 202651-200166 contacts →

Exact match

“Q Laboratories is an FDA/MoCRA registered (#1527260), cGMP/GLP compliant, and ISO/IEC 17025 accredited contract laboratory supporting global brands in delivering safe…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-200131 contacts →

Exact match

“Eagle Analytical is an FDA- and DEA-registered, A2LA ISO 17025-accredited laboratory that provides analytical chemistry, microbiological testing, consulting, and technical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHercules, CA, United StatesHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“Pacific BioLabs is the leading West Coast provider of GMP/GLP laboratory testing services supporting Medical Device, Pharmaceutical, and Biotechnology industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchIrvine, CA, United StatesHQ recorded Nov 6, 202651-200101 contacts →

Exact match

“Nitto Avecia Pharma Services is your single source for analytical services for the pharma, biotech, and medical device industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSan Jose, CA, United StatesHQ recorded Nov 6, 202651-20095 contacts →

Exact match

“WESTPAK, Inc, a leading 3rd-party independent testing laboratory, provides trusted solutions for the medical device, pharmaceutical, and high-tech industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchGarden Grove, CA, United StatesHQ recorded Nov 6, 202611-5085 contacts →

Exact match

“Founded in 1997, Alkemist Labs is a pioneer in botanical identity testing with expanded capabilities in phytochemical potency analysis.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLancaster, CA, United StatesHQ recorded Nov 6, 202651-20083 contacts →

Exact match

“Infinity Laboratories, now part of Eurofins network of laboratories, is a leading contract testing organization with a national network of state-of-the-art facilities, ensuring…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchWoodbridge, CT, United StatesHQ recorded Nov 6, 202651-20080 contacts →

Exact match

“LEADING THE SUPPLY OF HIGH QUALITY GENERIC APIs 21st Century economic, social, technical and regulatory dynamics are dramatically changing the pharmaceutical world making it more…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBluffdale, UT, United StatesHQ recorded Nov 6, 202651-20070 contacts →

Exact match

“Canyon Labs partners with pharmaceutical and medical device companies to support products from development through launch and long-term market maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20070 contacts →

Exact match

“Texas OilTech Laboratories, is committed to remaining a world-class petroleum testing laboratory for the analysis of fuels, lubricants, petrochemical, and environmental materials.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchTraverse City, MI, United StatesHQ recorded Nov 6, 202651-20069 contacts →

Exact match

“Analytical testing & product development company specializing in natural products including natural foods, dietary supplements, botanical products, and natural pharmaceuticals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchGrand Prairie, TX, United StatesHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“AFL provides analyt­ical data for the consumer goods industry, from concept to consump­tion -working with national, regional, and local clients in the food, phar­ma­ceu­tical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20059 contacts →

Exact match

“Avance Biosciences is a leading Contract Research Organization (CRO) and Contract Testing Organization (CTO) providing CGMP and GLP-compliant analytical and bioanalytical services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchPortland, OR, United StatesHQ recorded Nov 6, 202611-5056 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchFremont, CA, United StatesHQ recorded Nov 6, 202611-5055 contacts →

Exact match

“AEMTEK is a high quality, third party laboratory that provides testing, research, training, consulting services, and sampling products for the food, environmental, water…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchKnoxville, TN, United StatesHQ recorded Nov 6, 202651-20050 contacts →

Exact match

“Galbraith Laboratories, Inc, a Bureau Veritas Company, is a contract analytical testing laboratory with over 64 years of experience in the global marketplace.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPasadena, AZ, United StatesHQ recorded Nov 6, 202611-5046 contacts →

Exact match

“Encore Labs is a state-of-the-art testing laboratory that delivers quality laboratory cannabis testing to ensure accurate potency and safe product driven analysis from our…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchToledo, OH, United StatesHQ recorded Nov 6, 202611-5044 contacts →

Exact match

“LexaMed is a company dedicated to providing the pharmaceutical, medical device and biotechnology industries with quality, compliant, state-of-the-art services in the areas of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 234 api testing laboratories based in the United States

See the full list, filter by size, metro and specialty, and access 3,198 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Api testing laboratories based in the United States at a glance

As of Nov 6, 2026
40.3%Verified-email coverage
33.9Average contacts per company
11-50Median size (employees)
2.6%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
78
11-50
112
51-200
29
201-500
6
501-1,000
4
1,001-5,000
3
5,001-10,000
1

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 234 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 “api testing laboratories” 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 3,198 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 November 6, 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 “api testing laboratories”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many api testing laboratories are there based in the United States?

RevenueBase identified 234 company matches for api testing laboratories associated with the United States as of November 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?

Eurofins Lancaster Laboratories tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most api testing laboratories?

Houston leads with 6 company records, followed by St. Louis (6) and Denver (4).

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 3,198 professional contacts with verified work emails tracked across these 234 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 November 6, 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.