Company lists · Data refreshed September 2026
Top 25 Testing companies based in the United States
RevenueBase identified 1,085 company matches for testing companies associated with the United States as of September 2026 and tracks 59,253 professional contacts across them, including 21,123 with verified work emails. Houston is the largest hub.
This list covers company matches for testing 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 21, 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.
The 25 largest testing companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 21, 2026 · View company records in RevenueBase | |||||
| 2 | 7,081 contacts → | ||||
Exact match “In 2023, Emerson acquired NI and introduced its new Test & Measurement business group.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 3,447 contacts → | ||||
Exact match “The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 2,230 contacts → | ||||
Exact match “NV5 is a provider of technology, conformity assessment, and consulting solutions for public and private sector clients supporting infrastructure, utility, and building assets and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 2,228 contacts → | ||||
Exact match “Pace® Science and Technology Company makes the world a safer, healthier place.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 1,638 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 · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 1,093 contacts → | ||||
Exact match “Illuminate Your Path with a Wonderful Career at Visit gaminglabs.com/careers for great career opportunities!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 1,022 contacts → | ||||
Exact match “PSI has over 70 years of experience providing worldwide testing solutions to corporations, federal and state government agencies, professional associations, certifying bodies and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 980 contacts → | ||||
Exact match “a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 890 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 21, 2026 · View company records in RevenueBase | |||||
| 11 | 778 contacts → | ||||
Exact match “Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 719 contacts → | ||||
Exact match “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 712 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 21, 2026 · View company records in RevenueBase | |||||
| 14 | 651 contacts → | ||||
Exact match “IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 494 contacts → | ||||
Exact match “Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 451 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 442 contacts → | ||||
Exact match “SPL is a leading provider of compliance and testing services for Environmental, Energy, and other end markets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 415 contacts → | ||||
Exact match “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 403 contacts → | ||||
Exact match “We are celebrating 30 years of testing excellence and innovation at LogiGear, we're proud to be a cornerstone in our clients' journeys, delivering confidence not just in our…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 390 contacts → | ||||
Exact match “NSF is the leading global certifier of Global Food Safety Initiative (GFSI) benchmarked certifications.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 381 contacts → | ||||
Exact match “Life Cycle Testing, Inspection, Certification & Engineering Solutions for Mission Critical Facilities Worldwide Commitment to Diversity – FST is dedicated to non-discriminatory…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 347 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 21, 2026 · View company records in RevenueBase | |||||
| 23 | 314 contacts → | ||||
Exact match “Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 310 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 21, 2026 · View company records in RevenueBase | |||||
| 25 | 287 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 · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “testing companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,085 testing companies based in the United States
See the full list, filter by size, metro and specialty, and access 21,123 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Testing companies based in the United States at a glance
As of Sep 21, 2026Companies by employee count
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 1,085 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 “testing 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 21,123 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 21, 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 “testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many testing companies are there based in the United States?
RevenueBase identified 1,085 company matches for testing 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 testing companies?
Houston leads with 25 company records, followed by San Diego (16) and Austin (13).
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 21,123 professional contacts with verified work emails tracked across these 1,085 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,085 testing companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Testing companies by geography
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- Testing companies based in Hyderabad, India
- Testing companies based in Mumbai, India
- Testing companies based in Noida, India
- Testing companies based in Pune, India
- Testing companies based in Argentina
- Testing companies based in Australia
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- Testing companies based in Brazil
- Testing companies based in Canada
- Testing companies based in Chile
Browse the directory
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Testing companies based in Ahmedabad, India
- Testing companies based in Bangalore, India
- Testing companies based in Hyderabad, India
- Testing companies based in Mumbai, India
- Testing companies based in Noida, India
- Testing companies based in Pune, India
Company intelligence · public preview
Top 25 testing companies based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,085 matching company records for testing companies based in the United States, with 59,253 tracked contacts and 21,123 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 testing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  UL Solutionsul.comHQ: Northbrook, IL, United StatesReported employees: 10001+ | Northbrook, IL, United States | 10001+ | Exact match | 12,316 contacts → |
“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 description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  NI National Instrumentsni.comHQ: Austin, TX, United StatesReported employees: 5,001-10,000 | Austin, TX, United States | 5,001-10,000 | Exact match | 7,081 contacts → |
“In 2023, Emerson acquired NI and introduced its new Test & Measurement business group.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Amspec Groupamspecgroup.comHQ: Cranbury, NJ, United StatesReported employees: 5,001-10,000 | Cranbury, NJ, United States | 5,001-10,000 | Exact match | 3,447 contacts → |
“The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Nv5nv5.comHQ: Hollywood, FL, United StatesReported employees: 1,001-5,000 | Hollywood, FL, United States | 1,001-5,000 | Exact match | 2,230 contacts → |
“NV5 is a provider of technology, conformity assessment, and consulting solutions for public and private sector clients supporting infrastructure, utility, and building assets and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Pace Analytical Servicespacelabs.com HQ: Minneapolis, MN, United StatesReported employees: 1,001-5,000 | Minneapolis, MN, United States | 1,001-5,000 | Exact match | 2,228 contacts → |
“Pace® Science and Technology Company makes the world a safer, healthier place.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Eurofins Lancaster Laboratorieseurofinsus.comHQ: Lancaster, PA, United StatesReported employees: 1,001-5,000 | Lancaster, PA, United States | 1,001-5,000 | Exact match | 1,638 contacts → |
“Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Gaming Laboratories International, LLCgaminglabs.comHQ: Lakewood, NJ, United StatesReported employees: 1,001-5,000 | Lakewood, NJ, United States | 1,001-5,000 | Exact match | 1,093 contacts → |
“Illuminate Your Path with a Wonderful Career at Visit gaminglabs.com/careers for great career opportunities!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  PSI Services LLCpsiexams.comHQ: Olathe, KS, United StatesReported employees: 1,001-5,000 | Olathe, KS, United States | 1,001-5,000 | Exact match | 1,022 contacts → |
“PSI has over 70 years of experience providing worldwide testing solutions to corporations, federal and state government agencies, professional associations, certifying bodies and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  A1qaa1qa.comHQ: Decatur, GA, United StatesReported employees: 1,001-5,000 | Decatur, GA, United States | 1,001-5,000 | Exact match | 980 contacts → |
“a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Applied Technical Services, LLCatslab.comHQ: Marietta, GA, United StatesReported employees: 1,001-5,000 | Marietta, GA, United States | 1,001-5,000 | Exact match | 890 contacts → |
“Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Professional Service Industries, Inc. PSIintertek.comHQ: Arlington Heights, IL, United StatesReported employees: 1,001-5,000 | Arlington Heights, IL, United States | 1,001-5,000 | Exact match | 778 contacts → |
“Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Emsl Analytical, INCemsl.com HQ: Cinnaminson, NJ, United StatesReported employees: 501-1,000 | Cinnaminson, NJ, United States | 501-1,000 | Exact match | 719 contacts → |
“As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  TÜV Rheinland North Americatuv.comHQ: Boxborough, MA, United StatesReported employees: 501-1,000 | Boxborough, MA, United States | 501-1,000 | Exact match | 712 contacts → |
“TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  IEH Laboratories And Consulting Groupiehinc.comHQ: Lake Forest Park, WA, United StatesReported employees: 1,001-5,000 | Lake Forest Park, WA, United States | 1,001-5,000 | Exact match | 651 contacts → |
“IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Microbac Laboratories, INCmicrobac.com HQ: Pittsburgh, PA, United StatesReported employees: 501-1,000 | Pittsburgh, PA, United States | 501-1,000 | Exact match | 494 contacts → |
“Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Food Safety NET Servicesfsns.com HQ: San Antonio, TX, United StatesReported employees: 501-1,000 | San Antonio, TX, United States | 501-1,000 | Exact match | 451 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | SPLspllabs.com HQ: Houston, United StatesReported employees: 501-1,000 | Houston, United States | 501-1,000 | Exact match | 442 contacts → |
“SPL is a leading provider of compliance and testing services for Environmental, Energy, and other end markets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Astegicastegic.comHQ: Falls Church, VA, United StatesReported employees: 51-200 | Falls Church, VA, United States | 51-200 | Exact match | 415 contacts → |
“For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Logigear Corporationlogigear.comHQ: San Mateo, CA, United StatesReported employees: 501-1,000 | San Mateo, CA, United States | 501-1,000 | Exact match | 403 contacts → |
“We are celebrating 30 years of testing excellence and innovation at LogiGear, we're proud to be a cornerstone in our clients' journeys, delivering confidence not just in our…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  NSFnsf.orgHQ: Ann Arbor, MI, United StatesReported employees: 501-1,000 | Ann Arbor, MI, United States | 501-1,000 | Exact match | 390 contacts → |
“NSF is the leading global certifier of Global Food Safety Initiative (GFSI) benchmarked certifications.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  FST Technical Servicesfsttechnical.comHQ: Chandler, AZ, United StatesReported employees: 201-500 | Chandler, AZ, United States | 201-500 | Exact match | 381 contacts → |
“Life Cycle Testing, Inspection, Certification & Engineering Solutions for Mission Critical Facilities Worldwide Commitment to Diversity – FST is dedicated to non-discriminatory…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Quality Professionals Q-Prosq-pros.comHQ: TX, United StatesReported employees: 501-1,000 | TX, United States | 501-1,000 | Exact match | 347 contacts → |
“Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Atl, A Bureau Veritas Companyatlscience.comHQ: Milford, OH, United StatesReported employees: 501-1,000 | Milford, OH, United States | 501-1,000 | Exact match | 314 contacts → |
“Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Smitherssmithers.com HQ: Akron, OH, United StatesReported employees: 501-1,000 | Akron, OH, United States | 501-1,000 | Exact match | 310 contacts → |
“Founded in 1925 and headquartered in Akron, Ohio, Smithers is a multinational provider of testing, consulting, information, and certification services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Certified Laboratories, INCcertified-laboratories.comHQ: Melville, NY, United StatesReported employees: 1,001-5,000 | Melville, NY, United States | 1,001-5,000 | Exact match | 287 contacts → |
“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 description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,085 company matches
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Testing companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,084 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,085 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many testing companies did RevenueBase find based in the United States?
The saved snapshot records 1,085 matching company records, 59,253 tracked contacts and 21,123 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Testing companies by geography
- Testing companies based in Ahmedabad, India
- Testing companies based in Bangalore, India
- Testing companies based in Hyderabad, India
- Testing companies based in Mumbai, India
- Testing companies based in Noida, India
- Testing companies based in Pune, India
- Testing companies based in Argentina
- Testing companies based in Australia
- Testing companies based in Belgium
- Testing companies based in Brazil
- Testing companies based in Canada
- Testing companies based in Chile
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 testing companies based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/testing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Testing companies based in Ahmedabad, India
- Testing companies based in Bangalore, India
- Testing companies based in Hyderabad, India
- Testing companies based in Mumbai, India
- Testing companies based in Noida, India
- Testing companies based in Pune, India
Company intelligence · public preview
Top 25 testing companies based in the United States
RevenueBase records 1,085 matching company records for testing companies based in the United States, with 59,253 tracked contacts and 21,123 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 testing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | UL Solutionsul.com HQ: Northbrook, IL, United StatesReported employees: 10001+ | Northbrook, IL, United States | 10001+ | Exact match | 12,316 contacts → |
“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 description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | NI National Instrumentsni.com HQ: Austin, TX, United StatesReported employees: 5,001-10,000 | Austin, TX, United States | 5,001-10,000 | Exact match | 7,081 contacts → |
“In 2023, Emerson acquired NI and introduced its new Test & Measurement business group.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Amspec Groupamspecgroup.com HQ: Cranbury, NJ, United StatesReported employees: 5,001-10,000 | Cranbury, NJ, United States | 5,001-10,000 | Exact match | 3,447 contacts → |
“The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Nv5nv5.com HQ: Hollywood, FL, United StatesReported employees: 1,001-5,000 | Hollywood, FL, United States | 1,001-5,000 | Exact match | 2,230 contacts → |
“NV5 is a provider of technology, conformity assessment, and consulting solutions for public and private sector clients supporting infrastructure, utility, and building assets and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Pace Analytical Servicespacelabs.com HQ: Minneapolis, MN, United StatesReported employees: 1,001-5,000 | Minneapolis, MN, United States | 1,001-5,000 | Exact match | 2,228 contacts → |
“Pace® Science and Technology Company makes the world a safer, healthier place.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Eurofins Lancaster Laboratorieseurofinsus.com HQ: Lancaster, PA, United StatesReported employees: 1,001-5,000 | Lancaster, PA, United States | 1,001-5,000 | Exact match | 1,638 contacts → |
“Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Gaming Laboratories International, LLCgaminglabs.com HQ: Lakewood, NJ, United StatesReported employees: 1,001-5,000 | Lakewood, NJ, United States | 1,001-5,000 | Exact match | 1,093 contacts → |
“Illuminate Your Path with a Wonderful Career at Visit gaminglabs.com/careers for great career opportunities!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | PSI Services LLCpsiexams.com HQ: Olathe, KS, United StatesReported employees: 1,001-5,000 | Olathe, KS, United States | 1,001-5,000 | Exact match | 1,022 contacts → |
“PSI has over 70 years of experience providing worldwide testing solutions to corporations, federal and state government agencies, professional associations, certifying bodies and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | A1qaa1qa.com HQ: Decatur, GA, United StatesReported employees: 1,001-5,000 | Decatur, GA, United States | 1,001-5,000 | Exact match | 980 contacts → |
“a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Applied Technical Services, LLCatslab.com HQ: Marietta, GA, United StatesReported employees: 1,001-5,000 | Marietta, GA, United States | 1,001-5,000 | Exact match | 890 contacts → |
“Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Professional Service Industries, Inc. PSIintertek.com HQ: Arlington Heights, IL, United StatesReported employees: 1,001-5,000 | Arlington Heights, IL, United States | 1,001-5,000 | Exact match | 778 contacts → |
“Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Emsl Analytical, INCemsl.com HQ: Cinnaminson, NJ, United StatesReported employees: 501-1,000 | Cinnaminson, NJ, United States | 501-1,000 | Exact match | 719 contacts → |
“As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | TÜV Rheinland North Americatuv.com HQ: Boxborough, MA, United StatesReported employees: 501-1,000 | Boxborough, MA, United States | 501-1,000 | Exact match | 712 contacts → |
“TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | IEH Laboratories And Consulting Groupiehinc.com HQ: Lake Forest Park, WA, United StatesReported employees: 1,001-5,000 | Lake Forest Park, WA, United States | 1,001-5,000 | Exact match | 651 contacts → |
“IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Microbac Laboratories, INCmicrobac.com HQ: Pittsburgh, PA, United StatesReported employees: 501-1,000 | Pittsburgh, PA, United States | 501-1,000 | Exact match | 494 contacts → |
“Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Food Safety NET Servicesfsns.com HQ: San Antonio, TX, United StatesReported employees: 501-1,000 | San Antonio, TX, United States | 501-1,000 | Exact match | 451 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | SPLspllabs.com HQ: Houston, United StatesReported employees: 501-1,000 | Houston, United States | 501-1,000 | Exact match | 442 contacts → |
“SPL is a leading provider of compliance and testing services for Environmental, Energy, and other end markets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Astegicastegic.com HQ: Falls Church, VA, United StatesReported employees: 51-200 | Falls Church, VA, United States | 51-200 | Exact match | 415 contacts → |
“For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Logigear Corporationlogigear.com HQ: San Mateo, CA, United StatesReported employees: 501-1,000 | San Mateo, CA, United States | 501-1,000 | Exact match | 403 contacts → |
“We are celebrating 30 years of testing excellence and innovation at LogiGear, we're proud to be a cornerstone in our clients' journeys, delivering confidence not just in our…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | NSFnsf.org HQ: Ann Arbor, MI, United StatesReported employees: 501-1,000 | Ann Arbor, MI, United States | 501-1,000 | Exact match | 390 contacts → |
“NSF is the leading global certifier of Global Food Safety Initiative (GFSI) benchmarked certifications.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | FST Technical Servicesfsttechnical.com HQ: Chandler, AZ, United StatesReported employees: 201-500 | Chandler, AZ, United States | 201-500 | Exact match | 381 contacts → |
“Life Cycle Testing, Inspection, Certification & Engineering Solutions for Mission Critical Facilities Worldwide Commitment to Diversity – FST is dedicated to non-discriminatory…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Quality Professionals Q-Prosq-pros.com HQ: TX, United StatesReported employees: 501-1,000 | TX, United States | 501-1,000 | Exact match | 347 contacts → |
“Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Atl, A Bureau Veritas Companyatlscience.com HQ: Milford, OH, United StatesReported employees: 501-1,000 | Milford, OH, United States | 501-1,000 | Exact match | 314 contacts → |
“Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Smitherssmithers.com HQ: Akron, OH, United StatesReported employees: 501-1,000 | Akron, OH, United States | 501-1,000 | Exact match | 310 contacts → |
“Founded in 1925 and headquartered in Akron, Ohio, Smithers is a multinational provider of testing, consulting, information, and certification services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Certified Laboratories, INCcertified-laboratories.com HQ: Melville, NY, United StatesReported employees: 1,001-5,000 | Melville, NY, United States | 1,001-5,000 | Exact match | 287 contacts → |
“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 description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,085 company matches
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Testing companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,084 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,085 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many testing companies did RevenueBase find based in the United States?
The saved snapshot records 1,085 matching company records, 59,253 tracked contacts and 21,123 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 testing companies based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/testing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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