Company lists · Data refreshed September 2026

Top 25 Electronics testing services based in the United States

Name: Electronics testing 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 16, 2026 498 companies tracked

RevenueBase identified 498 electronics testing services headquartered in the United States as of September 2026 and tracks 39,983 professional contacts across them, including 14,066 with verified work emails. San Jose is the largest hub.

This list covers electronics testing 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 16, 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 16, 2026 86% judged on-target in blind review

498Companies

39,983Contacts tracked

14,066Verified emails

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The 25 largest electronics testing services based in the United States

Ranked by team size

Top 25 of 498 electronics testing services based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to electronics testing 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	UL Solutions	Indirect evidence	Northbrook, IL, United StatesHQ checked Sep 16, 2026	10001+	12,316 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
2	NI National Instruments	Indirect evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	7,081 contacts →
	Indirect evidence “In 2023, Emerson acquired NI and introduced its new Test & Measurement business group.” Source: RevenueBase Database · checked Sep 16, 2026
3	Teradyne	Indirect evidence	North Reading, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	4,720 contacts →
	Indirect evidence “Teradyne brings high-quality innovations such as smart devices, life-saving medical equipment and data storage systems to market, faster.” Source: RevenueBase Database · checked Sep 16, 2026
4	Stratosphere Quality	Indirect evidence	Fishers, IN, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,553 contacts →
	Indirect evidence “Stratosphere Quality, founded in 2009, is a major global provider of quality assurance and outsourcing solutions, such as sorting and inspection services, to manufacturers of…” Source: RevenueBase Database · checked Sep 16, 2026
5	Formfactor INC	Indirect evidence	Livermore, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,485 contacts →
	Indirect evidence “FormFactor is a leading provider of essential test and measurement technologies along the full IC life cycle – from characterization, modeling, reliability, and design debug, to…” Source: RevenueBase Database · checked Sep 16, 2026
6	TÜV Rheinland North America	Partial evidence	Boxborough, MA, United StatesHQ checked Sep 16, 2026	501-1,000	712 contacts →
	Partial evidence “TÜV Rheinland is a world leader in testing, inspection and certification services for a wide variety of industries.” Source: RevenueBase Database · checked Sep 16, 2026
7	Electric Power Systems	Partial evidence	Maryland Heights, MO, United StatesHQ checked Sep 16, 2026	501-1,000	653 contacts →
	Partial evidence “Electric Power Systems is an independent electrical testing & engineering organization.” Source: RevenueBase Database · checked Sep 16, 2026
8	Eurofins EAG Laboratories	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	632 contacts →
	Indirect evidence “When it comes to understanding the physical structure, chemical properties and performance of advanced materials and integrated circuitry, no other scientific services company…” Source: RevenueBase Database · checked Sep 16, 2026
9	Doble Engineering	Indirect evidence	Marlborough, MA, United StatesHQ checked Sep 16, 2026	501-1,000	619 contacts →
	Indirect evidence “Doble is the world’s most trusted brand in electrical diagnostics.” Source: RevenueBase Database · checked Sep 16, 2026
10	Vayan Group, LLC	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 16, 2026	1,001-5,000	476 contacts →
	Partial evidence “Vayan Group, LLC is a leading provider of technology-driven quality assurance solutions for OEMs, Tier 1 and Tier 2 suppliers across the automotive, aerospace, electronics…” Source: RevenueBase Database · checked Sep 16, 2026
11	Astegic	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	51-200	415 contacts →
	Partial evidence “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Source: RevenueBase Database · checked Sep 16, 2026
12	Logigear Corporation	Partial evidence	San Mateo, CA, United StatesHQ checked Sep 16, 2026	501-1,000	403 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
13	Quality Professionals Q-Pros	Partial evidence	TX, United StatesHQ checked Sep 16, 2026	501-1,000	347 contacts →
	Partial evidence “Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.” Source: RevenueBase Database · checked Sep 16, 2026
14	Electrical Reliability Services, INC	Indirect evidence	Westerville, OH, United StatesHQ checked Sep 16, 2026	201-500	228 contacts →
	Indirect evidence “In business since 1971, Electrical Reliability Services, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
15	MGA Research Corporation	Partial evidence	Akron, NY, United StatesHQ checked Sep 16, 2026	201-500	224 contacts →
	Partial evidence “MGA is recognized worldwide as one of the leading independent providers of testing services and equipment.” Source: RevenueBase Database · checked Sep 16, 2026
16	Granite River Labs INC	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 16, 2026	201-500	222 contacts →
	Indirect evidence “GRL is the world’s leading Engineering Services firm helping engineers solve difficult hardware design and validation challenges in adopting digital interface technologies.” Source: RevenueBase Database · checked Sep 16, 2026
17	PRO QC International	Indirect evidence	Mchenry, IL, United StatesHQ checked Sep 16, 2026	501-1,000	211 contacts →
	Indirect evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 16, 2026
18	Consolidated Engineering Laboratories	Partial evidence	San Ramon, CA, United StatesHQ checked Sep 16, 2026	201-500	201 contacts →
	Partial evidence “At Consolidated Engineering Laboratories (CEL) we consider ourselves more than a Testing Laboratory.” Source: RevenueBase Database · checked Sep 16, 2026
19	GES	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	501-1,000	186 contacts →
	Indirect evidence “GES is among the global leaders in automation, test and measurement.” Source: RevenueBase Database · checked Sep 16, 2026
20	Eurofins Electrical & Electronics North America	Strong evidence	Baltimore, MD, United StatesHQ checked Sep 16, 2026	201-500	180 contacts →
	Strong evidence “Eurofins Electrical & Electronics North America is a leading testing and certification laboratory, providing a unique array of testing services and accreditations for regulatory…” Source: RevenueBase Database · checked Sep 16, 2026
21	Qualitylogic	Indirect evidence	Boise, ID, United StatesHQ checked Sep 16, 2026	51-200	157 contacts →
	Indirect evidence “QualityLogic delivers full spectrum QA products and services to technology companies in rapidly evolving markets, or where transformative technologies are changing the world.” Source: RevenueBase Database · checked Sep 16, 2026
22	Trialon Corporation	Indirect evidence	Burton, MI, United StatesHQ checked Sep 16, 2026	501-1,000	154 contacts →
	Indirect evidence “Trialon is now Element!” Source: RevenueBase Database · checked Sep 16, 2026
23	Trio-Tech International	Partial evidence	Van Nuys, CA, United StatesHQ checked Sep 16, 2026	501-1,000	134 contacts →
	Partial evidence “Founded in 1958, Trio-Tech International (NYSE MKT: TRT) is a leading provider of semiconductor testing services, manufacturing solutions, and value-added distribution services.” Source: RevenueBase Database · checked Sep 16, 2026
24	ISE Labs ASE	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	51-200	132 contacts →
	Indirect evidence “ISE Labs is a one-stop semiconductor engineering service provider.” Source: RevenueBase Database · checked Sep 16, 2026
25	Circuit Check INC	Partial evidence	Maple Grove, MN, United StatesHQ checked Sep 16, 2026	201-500	129 contacts →
	Partial evidence “Circuit Check is a leading provider of automated test systems and test fixtures for complex electronic products for the automotive, military/aerospace, medical, industrial, and…” Source: RevenueBase Database · checked Sep 16, 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: electronics testing 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 electronics testing services.
Partial evidence: Its own public description names part of electronics testing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electronics testing 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 498 electronics testing services based in the United States

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Electronics testing services based in the United States at a glance

As of Sep 16, 2026

35.2%Verified-email coverage

80.3Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · San Jose

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

205

11-50

170

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 498 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 electronics testing 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 “electronics testing 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 electronics testing 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 electronics testing 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, 14,066 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 16, 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 electronics testing 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 electronics testing services are there based in the United States?

RevenueBase identified 498 electronics testing 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?

UL Solutions, headquartered in Northbrook, tops this list with the largest team on record.

Which city has the most electronics testing services?

San Jose leads with 16 headquartered companies, followed by Fremont (9) and San Diego (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 14,066 verified decision-maker contacts tracked across these 498 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 16, 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.