Company lists · Data refreshed September 2026

Top 25 Electronics testing companies based in the United States

Name: Electronics testing companies 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 466 companies tracked

RevenueBase identified 466 electronics testing companies headquartered in the United States as of September 2026 and tracks 47,977 professional contacts across them, including 18,957 with verified work emails. San Jose is the largest hub.

This list covers electronics testing companies 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

466Companies

47,977Contacts tracked

18,957Verified emails

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The 25 largest electronics testing companies based in the United States

Ranked by team size

Top 25 of 466 electronics testing companies 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 companies: 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	Keysight Technologies	Indirect evidence	Santa Rosa, CA, United StatesHQ checked Sep 16, 2026	10001+	11,668 contacts →
	Indirect evidence “Keysight empowers innovators to explore, design, and bring world-changing technologies to life.” Source: RevenueBase Database · checked Sep 16, 2026
3	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
4	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
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	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
9	Smithers	Partial evidence	Akron, OH, United StatesHQ checked Sep 16, 2026	501-1,000	310 contacts →
	Partial 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 16, 2026
10	Delta Design	Indirect evidence	Poway, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	293 contacts →
	Indirect evidence “Cohu is a publicly traded (NASDAQ: COHU) global company with headquarters in Poway, CA.” Source: RevenueBase Database · checked Sep 16, 2026
11	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
12	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
13	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
14	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
15	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
16	Thermotron Industries	Indirect evidence	Holland, MI, United StatesHQ checked Sep 16, 2026	201-500	164 contacts →
	Indirect evidence “For more than 55 years, Thermotron has provided quality environmental test equipment.” Source: RevenueBase Database · checked Sep 16, 2026
17	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
18	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
19	Chroma Systems Solutions, INC	Indirect evidence	Foothill Ranch, CA, United StatesHQ checked Sep 16, 2026	51-200	153 contacts →
	Indirect evidence “Chroma is the largest worldwide provider of power test instruments and automated test systems.” Source: RevenueBase Database · checked Sep 16, 2026
20	Micro Control Company	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	201-500	136 contacts →
	Indirect evidence “Micro Control Company is the global leader in burn-in with test systems, committed to delivering excellence and innovation for over 50 years.” Source: RevenueBase Database · checked Sep 16, 2026
21	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
22	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
23	Tinius Olsen	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 16, 2026	51-200	114 contacts →
	Indirect evidence “At Tinius Olsen we specialize in the manufacture and supply of test systems to prove the performance and strength of raw materials including metals, alloys, composites, plastics…” Source: RevenueBase Database · checked Sep 16, 2026
24	Strata-G Solutions, LLC	Indirect evidence	Huntsville, AL, United StatesHQ checked Sep 16, 2026	51-200	105 contacts →
	Indirect evidence “Strata-G Solutions provides unrivaled competency in test-system engineering to both commercial and military customers.” Source: RevenueBase Database · checked Sep 16, 2026
25	Dit-Mco International	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 16, 2026	51-200	102 contacts →
	Partial evidence “DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” 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 companies. 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 companies.
Partial evidence: Its own public description names part of electronics testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electronics testing companies. 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 466 electronics testing companies based in the United States

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Electronics testing companies based in the United States at a glance

As of Sep 16, 2026

39.5%Verified-email coverage

103.0Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · San Jose

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

186

11-50

169

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 466 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 companies, 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 companies”. 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 companies), 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 companies, 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, 18,957 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 companies, 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 companies are there based in the United States?

RevenueBase identified 466 electronics testing companies 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 companies?

San Jose leads with 17 headquartered companies, followed by Austin (11) and Fremont (9).

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 18,957 verified decision-maker contacts tracked across these 466 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.