Company lists · Data refreshed September 2026

Top 25 Semiconductor testing equipment makers based in the United States

RevenueBase identified 262 company matches for semiconductor testing equipment makers associated with the United States as of September 2026 and tracks 42,955 professional contacts across them, including 14,863 with verified work emails. San Jose is the largest hub.

This list covers company matches for semiconductor testing equipment makers 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 17, 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 Sep 17, 2026 How this list was built
262Companies
42,955Contacts tracked
14,863Verified emails
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The 25 largest semiconductor testing equipment makers based in the United States

Ranked by team size
Top 25 of 262 company matches for semiconductor testing equipment makers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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 matchMilpitas, CA, United StatesHQ recorded Sep 17, 202610001+12,672 contacts →

Exact match

“KLA develops industry-leading equipment and services that enable innovation throughout the electronics industry.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Sep 17, 20265,001-10,0007,081 contacts →

Exact match

“In 2023, Emerson acquired NI and introduced its new Test & Measurement business group.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3Exact matchTempe, AZ, United StatesHQ recorded Sep 17, 202610001+6,435 contacts →

Exact match

“Amkor Technology, Inc.(Nasdaq: AMKR) is the world’s largest U.S-headquartered OSAT and is a global leader in outsourced semiconductor packaging and test services.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Sep 17, 2026n/a4,999 contacts →

Exact match

“GAO Tek is a member of GAO Group of Companies, headquartered in New York City, USA & Toronto, Canada with a strong global presence.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5Exact matchLivermore, CA, United StatesHQ recorded Sep 17, 20261,001-5,0001,485 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6Exact matchPlainview, NY, United StatesHQ recorded Sep 17, 20261,001-5,0001,189 contacts →

Exact match

“Making a Material Difference is at the core of our DNA.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7Exact matchWilmington, MA, United StatesHQ recorded Sep 17, 20261,001-5,0001,186 contacts →

Exact match

“Onto Innovation is a leader in process control, combining global scale with an expanded portfolio of leading-edge technologies that include: Un-patterned wafer quality; 3D…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8Exact matchSan Diego, CA, United StatesHQ recorded Sep 17, 20261,001-5,000769 contacts →

Exact match

“Cohu is the leading supplier of semiconductor test handlers and contactors, and a growing provider of automated test equipment, inspection & metrology solutions, and data…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9Exact matchFremont, CA, United StatesHQ recorded Sep 17, 2026501-1,000579 contacts →

Exact match

“Mattson Technology designs, manufactures, markets and supports semiconductor wafer processing equipment used in the fabrication of integrated circuits.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10Exact matchChestnut Ridge, NY, United StatesHQ recorded Sep 17, 2026201-500473 contacts →

Exact match

“Teledyne LeCroy is a leading manufacturer of advanced oscilloscopes, protocol analyzers, and other test instruments that verify performance, validate compliance, and debug complex…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11Exact matchSouth Plainfield, NJ, United StatesHQ recorded Sep 17, 202610001+280 contacts →

Exact match

“With the acquisition of R&D Altanova by Advantest, I am pleased I am now part of Advantest Interconnect Solutions (AIS).”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12Exact matchWichita, KS, United StatesHQ recorded Sep 17, 2026201-500217 contacts →

Exact match

“Our mission: to deliver secure, reliable, state-of-the-art semiconductors and semiconductor services with unwavering integrity.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13Exact matchTempe, AZ, United StatesHQ recorded Sep 17, 2026501-1,000179 contacts →

Exact match

“Nidec SV Probe was founded in 1994, and engages in the manufacture, marketing, and service of high performance probe cards and test solutions for the semiconductor industry.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14Exact matchCoopersburg, PA, United StatesHQ recorded Sep 17, 2026201-500147 contacts →

Exact match

“For over 400 years, intrepid mariners have embarked on long journeys into uncharted waters.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15Exact matchMinneapolis, MN, United StatesHQ recorded Sep 17, 2026201-500136 contacts →

Exact match

“Micro Control Company is the global leader in burn-in with test systems, committed to delivering excellence and innovation for over 50 years.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16Exact matchVan Nuys, CA, United StatesHQ recorded Sep 17, 2026501-1,000134 contacts →

Exact match

“Founded in 1958, Trio-Tech International (NYSE MKT: TRT) is a leading provider of semiconductor testing services, manufacturing solutions, and value-added distribution services.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17Exact matchFremont, CA, United StatesHQ recorded Sep 17, 202651-200132 contacts →

Exact match

“ISE Labs is a one-stop semiconductor engineering service provider.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18Exact matchMaple Grove, MN, United StatesHQ recorded Sep 17, 2026201-500129 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19Exact matchRichardson, TX, United StatesHQ recorded Sep 17, 202651-200102 contacts →

Exact match

“Founded in 1977, CI Systems has grown to include an Electro-Optics Test Systems division, a semiconductor division and a subsidiary in the electronic card assembly and inspection…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20Exact matchRichardson, TX, United StatesHQ recorded Sep 17, 2026201-50095 contacts →

Exact match

“Delivering world-class electronic test and testability solutions around the globe in semiconductor, systems and functional testing.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21Exact matchMinneapolis, MN, United StatesHQ recorded Sep 17, 202651-20092 contacts →

Exact match

“Founded in 1991, Johnstech offers test contactors and related services with the highest electrical and mechanical performance on the market, ensuring global semiconductor…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22Exact matchAustin, TX, United StatesHQ recorded Sep 17, 202651-20077 contacts →

Exact match

“Hiller Measurements designs, manufactures, and supports Automated Test Equipment (ATE) for complex mission critical electronics where the cost of failure is unacceptable.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23Exact matchPlano, TX, United StatesHQ recorded Sep 17, 202651-20066 contacts →

Exact match

“yieldWerx is a US-based semiconductor data and yield analytics company founded in 2010 in Plano, Texas.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24Exact matchSanta Clara, CA, United StatesHQ recorded Sep 17, 2026501-1,00064 contacts →

Exact match

“Harbor Electronics began fabricating highly specialized printed circuit boards for the ATE industry in 1995.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25Exact matchSan Diego, CA, United StatesHQ recorded Sep 17, 202651-20057 contacts →

Exact match

“ElevATE is a leading supplier of innovative, low power, high density components for the design of next generation Automated Test Equipment (ATE).”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

Showing 25 of 262 semiconductor testing equipment makers based in the United States

See the full list, filter by size, metro and specialty, and access 14,863 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Semiconductor testing equipment makers based in the United States at a glance

As of Sep 17, 2026
34.6%Verified-email coverage
164.0Average contacts per company
11-50Median size (employees)
8.4%Largest-city concentration · San Jose
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
92
11-50
93
51-200
33
201-500
16
501-1,000
10
1,001-5,000
10
5,001-10,000
3
10001+
4

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 262 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 “semiconductor testing equipment makers” 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 14,863 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 17, 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 “semiconductor testing equipment makers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many semiconductor testing equipment makers are there based in the United States?

RevenueBase identified 262 company matches for semiconductor testing equipment makers 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?

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

Which city has the most semiconductor testing equipment makers?

San Jose leads with 22 company records, followed by Austin (15) and Fremont (12).

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 14,863 professional contacts with verified work emails tracked across these 262 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 17, 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.