Company lists · Data refreshed November 2026
Top 25 Assembly and testing services worldwide
RevenueBase identified 1,553 company matches for assembly and testing services worldwide as of November 2026 and tracks 31,179 professional contacts across them, including 4,980 with verified work emails. The United States is the largest market and Shenzhen the largest hub.
This list covers company matches for assembly and testing services worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for assembly and testing services follow the table.
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 assembly and testing services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,793 contacts → | ||||
Exact match “UTAC Group Holdings Ltd (“UTAC Group”) is a leading independent provider of assembly and test services for a broad range of integrated circuits with diversified end uses…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 1,291 contacts → | ||||
Exact match “Unisem is a global provider of semiconductor assembly and test (OSAT) services for many of the world's most successful electronics companies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 1,212 contacts → | ||||
Exact match “Carsem is a leading provider of turnkey packaging and test services to the semiconductor industry, and offers one of the largest package and test portfolios in the world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 778 contacts → | ||||
Exact match “Exact x Forestall is a leading global provider of quality control solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 755 contacts → | ||||
Exact match “King Yuan Electronics Corp.(KYEC) provides wafer probing, final product test and assembly service for the semiconductor backend supply chain.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 548 contacts → | ||||
Exact match “A Success Enabler ASE Electronics (M) Sdn.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 450 contacts → | ||||
Exact match “Incap Corporation - flexible, agile and efficient electronics manufacturing services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 446 contacts → | ||||
Exact match “ATEC is driven by our vision of being the strategic partner to our customers, focusing on customized service and offering a consistently first-rate and dynamic range of technical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 442 contacts → | ||||
Exact match “Mack Technologies is a leading supplier of printed circuit board assembly, systems assembly, and electronics contract manufacturing services for the defense, communications…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 321 contacts → | ||||
Exact match “1988(OSAT, Outsourced Semiconductor Assembly and Test Services)30 WLCSP)(Bump)(Flip Chip)(Window BGA wBGA)IC 200345388 115,1006(OSAT Group)202112 2023 2023RBA 2023- 2023TTQS 2023…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 311 contacts → | ||||
Exact match “Established in May 1984, Siliconware Precision Industries Co, Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 278 contacts → | ||||
Exact match “Amkor Technology is one of the world’s largest providers of outsourced semiconductor packaging and test services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 249 contacts → | ||||
Exact match “Violin Technologies is a leading end-to-end electronic, electrical, and mechanical manufacturing solutions provider, serving customers across India, the United States, the UAE…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 247 contacts → | ||||
Exact match “We offer a range of engineering, assembly, testing and project lifecycle management services for the manufacture of complex precision machining and sheet metal components and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 210 contacts → | ||||
Exact match “Brandworks Technologies is one of India’s fastest-growing OEM and ODM partners, trusted by over 50 leading Indian and global brands.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 198 contacts → | ||||
Exact match “Established in 1988, Belton Technology Group is ISO 9001, 14001, certified and UL listed components and full turnkey contract manufacturer of - Flexible Printed Circuit Boards -…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 197 contacts → | ||||
Exact match “Norautron is an electronics, electro mechanical- and mechanical manufacturer providing the full range of services in a product life cycle We offer flexible and cost effective…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 193 contacts → | ||||
Exact match “Globetronics was started off by 2 ambitious entrepreneurs back in 1991 in a humble square feet rented facility.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 189 contacts → | ||||
Exact match “Rohde & Schwarz GmbH & Co.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 176 contacts → | ||||
Exact match “An integrated engineering supporting service provider with a range of services from automated equipment solutions, fabrication process, CNC machining to sub-modular mechanical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 174 contacts → | ||||
Exact match “Matric Group is a contract manufacturer of electronic assemblies, offering world-class Electronic Manufacturing Services (EMS) with personalized customer support, working closely…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 167 contacts → | ||||
Exact match “As a world-leading custom test and assembly automation solutions provider, we create efficient, powerful and reliable solutions for the manufacturing of automotive, electric…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 166 contacts → | ||||
Exact match “Since 2002, Opulent has been earning the trust of our clients and playing a pivotal role in their success through our complex manufacturing solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 142 contacts → | ||||
Exact match “In 1969, DFF began serving customers with quality development and low-quantity production services-on time and at competitive prices.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 140 contacts → | ||||
Exact match “SRXGlobal, A Scanfil Company, provides a wide range of electronic manufacturing services, such as • Product Design Engineering, Prototyping/NPI • PCB Assembly (SMT, BGA, COB…” Recorded in the RevenueBase company graph · Nov 6, 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 “assembly and testing services”. 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 1,553 assembly and testing services worldwide
See the full list, filter by size, metro and specialty, and access 4,980 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Assembly and testing services worldwide at a glance
As of Nov 6, 2026Companies by employee count
Email recency is reported on each country list linked below.
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.
- Coverage
- Every country. Country and city lists for assembly and testing services are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “assembly and testing services” 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. 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 4,980 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Assembly and testing services by location
10 lists · largest firstEvery Assembly and testing services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Assembly and testing services based in the United States374
- Assembly and testing services based in Germany148
- Assembly and testing services based in Italy123
- Assembly and testing services based in the United Kingdom100
- Assembly and testing services based in India65
- Assembly and testing services based in Brazil54
- Assembly and testing services based in Canada45
- Assembly and testing services based in Spain36
- Assembly and testing services based in France29
- Assembly and testing services based in Poland25
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 “assembly and testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many assembly and testing services are there worldwide?
RevenueBase identified 1,553 company matches for assembly and testing services worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
UTAC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most assembly and testing services?
The United States leads with 374 companies, followed by Germany (148) and Italy (123). Every assembly and testing services list by country and city is linked on this page.
Which city has the most assembly and testing services?
Shenzhen leads with 45 company records, followed by San Jose (16) and Bangalore (11).
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 4,980 professional contacts with verified work emails tracked across these 1,553 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,553 assembly and testing services worldwide. Start with a free account, no credit card.
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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.
More company lists
Company intelligence · public preview
Top 25 assembly and testing services worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,553 matching company records for assembly and testing services worldwide, with 31,179 tracked contacts and 4,980 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: November 6, 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 assembly and testing services worldwide
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 |  UTACutacgroup.comHQ: SingaporeReported employees: 10001+ | Singapore | 10001+ | Exact match | 1,793 contacts → |
“UTAC Group Holdings Ltd (“UTAC Group”) is a leading independent provider of assembly and test services for a broad range of integrated circuits with diversified end uses…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Unisemunisemgroup.comHQ: Kuala Lumpur, CA, MalaysiaReported employees: 5,001-10,000 | Kuala Lumpur, CA, Malaysia | 5,001-10,000 | Exact match | 1,291 contacts → |
“Unisem is a global provider of semiconductor assembly and test (OSAT) services for many of the world's most successful electronics companies.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Carsemcarsem.comHQ: Ipoh, MalaysiaReported employees: 5,001-10,000 | Ipoh, Malaysia | 5,001-10,000 | Exact match | 1,212 contacts → |
“Carsem is a leading provider of turnkey packaging and test services to the semiconductor industry, and offers one of the largest package and test portfolios in the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Exact X Forestall Groupexactforestall.comHQ: Częstochowa, PolandReported employees: 5,001-10,000 | Częstochowa, Poland | 5,001-10,000 | Exact match | 778 contacts → |
“Exact x Forestall is a leading global provider of quality control solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  KYECkyec.com.twHQ: Chu-nan, ChinaReported employees: 5,001-10,000 | Chu-nan, China | 5,001-10,000 | Exact match | 755 contacts → |
“King Yuan Electronics Corp.(KYEC) provides wafer probing, final product test and assembly service for the semiconductor backend supply chain.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ASE Electronics M SDN BHDasemal.com.my HQ: Bayan Lepas, MalaysiaReported employees: 1,001-5,000 | Bayan Lepas, Malaysia | 1,001-5,000 | Exact match | 548 contacts → |
“A Success Enabler ASE Electronics (M) Sdn.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  INCAPincapcorp.comHQ: Helsinki, FinlandReported employees: 1,001-5,000 | Helsinki, Finland | 1,001-5,000 | Exact match | 450 contacts → |
“Incap Corporation - flexible, agile and efficient electronics manufacturing services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Automated Technology Phil. Inc. - Atecatecphil.comHQ: United StatesReported employees: 501-1,000 | United States | 501-1,000 | Exact match | 446 contacts → |
“ATEC is driven by our vision of being the strategic partner to our customers, focusing on customized service and offering a consistently first-rate and dynamic range of technical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Mack Technologiesmacktech.comHQ: Westford, FL, United StatesReported employees: 1,001-5,000 | Westford, FL, United States | 1,001-5,000 | Exact match | 442 contacts → |
“Mack Technologies is a leading supplier of printed circuit board assembly, systems assembly, and electronics contract manufacturing services for the defense, communications…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Sigurd Microelectronics Corporation 矽格股份有限公司sigurd.com.twHQ: Chutung Chen, TaiwanReported employees: 1,001-5,000 | Chutung Chen, Taiwan | 1,001-5,000 | Exact match | 321 contacts → |
“1988(OSAT, Outsourced Semiconductor Assembly and Test Services)30 WLCSP)(Bump)(Flip Chip)(Window BGA wBGA)IC 200345388 115,1006(OSAT Group)202112 2023 2023RBA 2023- 2023TTQS 2023…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Siliconware Precision Industriesspil.com.twHQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 311 contacts → |
“Established in May 1984, Siliconware Precision Industries Co, Ltd.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Amkor Technology Portugal S.Aamkor.comHQ: Vila Do Conde, PortugalReported employees: 10001+ | Vila Do Conde, Portugal | 10001+ | Exact match | 278 contacts → |
“Amkor Technology is one of the world’s largest providers of outsourced semiconductor packaging and test services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Violin Technologies Private Limitedviolintec.comHQ: Chennai, IndiaReported employees: 501-1,000 | Chennai, India | 501-1,000 | Exact match | 249 contacts → |
“Violin Technologies is a leading end-to-end electronic, electrical, and mechanical manufacturing solutions provider, serving customers across India, the United States, the UAE…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Grand Venture Technology Private Limitedgvt.com.sgHQ: SingaporeReported employees: 1,001-5,000 | Singapore | 1,001-5,000 | Exact match | 247 contacts → |
“We offer a range of engineering, assembly, testing and project lifecycle management services for the manufacture of complex precision machining and sheet metal components and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | HQ: Mumbai, IndiaReported employees: 201-500 | Mumbai, India | 201-500 | Exact match | 210 contacts → |
“Brandworks Technologies is one of India’s fastest-growing OEM and ODM partners, trusted by over 50 leading Indian and global brands.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Belton Technology Groupbeltontechnology.comHQ: Hong KongReported employees: 10001+ | Hong Kong | 10001+ | Exact match | 198 contacts → |
“Established in 1988, Belton Technology Group is ISO 9001, 14001, certified and UL listed components and full turnkey contract manufacturer of - Flexible Printed Circuit Boards -…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Norautronnorautron.comHQ: Horten, NorwayReported employees: 501-1,000 | Horten, Norway | 501-1,000 | Exact match | 197 contacts → |
“Norautron is an electronics, electro mechanical- and mechanical manufacturer providing the full range of services in a product life cycle We offer flexible and cost effective…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Globetronics SDN BHDglobetronics.com.myHQ: Bayan Lepas, MalaysiaReported employees: 201-500 | Bayan Lepas, Malaysia | 201-500 | Exact match | 193 contacts → |
“Globetronics was started off by 2 ambitious entrepreneurs back in 1991 in a humble square feet rented facility.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Rohde & Schwarz Gmbh & Co. KGmemmingen.rohde-schwarz.com HQ: Memmingen, GermanyReported employees: 201-500 | Memmingen, Germany | 201-500 | Exact match | 189 contacts → |
“Rohde & Schwarz GmbH & Co.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  SFP Tech Holdings Berhadsfptechholdings.comHQ: Bukit Minyak, MalaysiaReported employees: 201-500 | Bukit Minyak, Malaysia | 201-500 | Exact match | 176 contacts → |
“An integrated engineering supporting service provider with a range of services from automated equipment solutions, fabrication process, CNC machining to sub-modular mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Matric Groupmatricgroup.comHQ: Seneca, PA, United StatesReported employees: 201-500 | Seneca, PA, United States | 201-500 | Exact match | 174 contacts → |
“Matric Group is a contract manufacturer of electronic assemblies, offering world-class Electronic Manufacturing Services (EMS) with personalized customer support, working closely…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  JOT Automationjotautomation.comHQ: Oulu, CA, FinlandReported employees: 201-500 | Oulu, CA, Finland | 201-500 | Exact match | 167 contacts → |
“As a world-leading custom test and assembly automation solutions provider, we create efficient, powerful and reliable solutions for the manufacturing of automotive, electric…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Opulentopulent-group.comHQ: Singapore, JapanReported employees: 501-1,000 | Singapore, Japan | 501-1,000 | Exact match | 166 contacts → |
“Since 2002, Opulent has been earning the trust of our clients and playing a pivotal role in their success through our complex manufacturing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  DFF Corporation, A Cadrex Companydffcorp.comHQ: Agawam, MA, United StatesReported employees: 201-500 | Agawam, MA, United States | 201-500 | Exact match | 142 contacts → |
“In 1969, DFF began serving customers with quality development and low-quantity production services-on time and at competitive prices.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Srxglobalsrxglobal.comHQ: Dandenong, AustraliaReported employees: 201-500 | Dandenong, Australia | 201-500 | Exact match | 140 contacts → |
“SRXGlobal, A Scanfil Company, provides a wide range of electronic manufacturing services, such as • Product Design Engineering, Prototyping/NPI • PCB Assembly (SMT, BGA, COB…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,553 company matches
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Assembly and testing services: dataset insights
November 6, 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
1,525 records in the displayed employee bands.
28 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 across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,553 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: November 6, 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 ↗
Assembly and testing services by location
10 lists · largest firstEvery Assembly and testing services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Assembly and testing services based in the United States374
- Assembly and testing services based in Germany148
- Assembly and testing services based in Italy123
- Assembly and testing services based in the United Kingdom100
- Assembly and testing services based in India65
- Assembly and testing services based in Brazil54
- Assembly and testing services based in Canada45
- Assembly and testing services based in Spain36
- Assembly and testing services based in France29
- Assembly and testing services based in Poland25
Questions about this company list
What does Exact match mean for assembly and testing services?
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 assembly and testing services did RevenueBase find worldwide?
The saved snapshot records 1,553 matching company records, 31,179 tracked contacts and 4,980 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: November 6, 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 assembly and testing services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/assembly-and-testing-services.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 assembly and testing services worldwide
RevenueBase records 1,553 matching company records for assembly and testing services worldwide, with 31,179 tracked contacts and 4,980 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: November 6, 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 assembly and testing services worldwide
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 | UTACutacgroup.com HQ: SingaporeReported employees: 10001+ | Singapore | 10001+ | Exact match | 1,793 contacts → |
“UTAC Group Holdings Ltd (“UTAC Group”) is a leading independent provider of assembly and test services for a broad range of integrated circuits with diversified end uses…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Unisemunisemgroup.com HQ: Kuala Lumpur, CA, MalaysiaReported employees: 5,001-10,000 | Kuala Lumpur, CA, Malaysia | 5,001-10,000 | Exact match | 1,291 contacts → |
“Unisem is a global provider of semiconductor assembly and test (OSAT) services for many of the world's most successful electronics companies.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Carsemcarsem.com HQ: Ipoh, MalaysiaReported employees: 5,001-10,000 | Ipoh, Malaysia | 5,001-10,000 | Exact match | 1,212 contacts → |
“Carsem is a leading provider of turnkey packaging and test services to the semiconductor industry, and offers one of the largest package and test portfolios in the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Exact X Forestall Groupexactforestall.com HQ: Częstochowa, PolandReported employees: 5,001-10,000 | Częstochowa, Poland | 5,001-10,000 | Exact match | 778 contacts → |
“Exact x Forestall is a leading global provider of quality control solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | KYECkyec.com.tw HQ: Chu-nan, ChinaReported employees: 5,001-10,000 | Chu-nan, China | 5,001-10,000 | Exact match | 755 contacts → |
“King Yuan Electronics Corp.(KYEC) provides wafer probing, final product test and assembly service for the semiconductor backend supply chain.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ASE Electronics M SDN BHDasemal.com.my HQ: Bayan Lepas, MalaysiaReported employees: 1,001-5,000 | Bayan Lepas, Malaysia | 1,001-5,000 | Exact match | 548 contacts → |
“A Success Enabler ASE Electronics (M) Sdn.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | INCAPincapcorp.com HQ: Helsinki, FinlandReported employees: 1,001-5,000 | Helsinki, Finland | 1,001-5,000 | Exact match | 450 contacts → |
“Incap Corporation - flexible, agile and efficient electronics manufacturing services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Automated Technology Phil. Inc. - Atecatecphil.com HQ: United StatesReported employees: 501-1,000 | United States | 501-1,000 | Exact match | 446 contacts → |
“ATEC is driven by our vision of being the strategic partner to our customers, focusing on customized service and offering a consistently first-rate and dynamic range of technical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mack Technologiesmacktech.com HQ: Westford, FL, United StatesReported employees: 1,001-5,000 | Westford, FL, United States | 1,001-5,000 | Exact match | 442 contacts → |
“Mack Technologies is a leading supplier of printed circuit board assembly, systems assembly, and electronics contract manufacturing services for the defense, communications…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Sigurd Microelectronics Corporation 矽格股份有限公司sigurd.com.tw HQ: Chutung Chen, TaiwanReported employees: 1,001-5,000 | Chutung Chen, Taiwan | 1,001-5,000 | Exact match | 321 contacts → |
“1988(OSAT, Outsourced Semiconductor Assembly and Test Services)30 WLCSP)(Bump)(Flip Chip)(Window BGA wBGA)IC 200345388 115,1006(OSAT Group)202112 2023 2023RBA 2023- 2023TTQS 2023…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Siliconware Precision Industriesspil.com.tw HQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 311 contacts → |
“Established in May 1984, Siliconware Precision Industries Co, Ltd.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Amkor Technology Portugal S.Aamkor.com HQ: Vila Do Conde, PortugalReported employees: 10001+ | Vila Do Conde, Portugal | 10001+ | Exact match | 278 contacts → |
“Amkor Technology is one of the world’s largest providers of outsourced semiconductor packaging and test services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Violin Technologies Private Limitedviolintec.com HQ: Chennai, IndiaReported employees: 501-1,000 | Chennai, India | 501-1,000 | Exact match | 249 contacts → |
“Violin Technologies is a leading end-to-end electronic, electrical, and mechanical manufacturing solutions provider, serving customers across India, the United States, the UAE…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Grand Venture Technology Private Limitedgvt.com.sg HQ: SingaporeReported employees: 1,001-5,000 | Singapore | 1,001-5,000 | Exact match | 247 contacts → |
“We offer a range of engineering, assembly, testing and project lifecycle management services for the manufacture of complex precision machining and sheet metal components and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | HQ: Mumbai, IndiaReported employees: 201-500 | Mumbai, India | 201-500 | Exact match | 210 contacts → |
“Brandworks Technologies is one of India’s fastest-growing OEM and ODM partners, trusted by over 50 leading Indian and global brands.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Belton Technology Groupbeltontechnology.com HQ: Hong KongReported employees: 10001+ | Hong Kong | 10001+ | Exact match | 198 contacts → |
“Established in 1988, Belton Technology Group is ISO 9001, 14001, certified and UL listed components and full turnkey contract manufacturer of - Flexible Printed Circuit Boards -…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Norautronnorautron.com HQ: Horten, NorwayReported employees: 501-1,000 | Horten, Norway | 501-1,000 | Exact match | 197 contacts → |
“Norautron is an electronics, electro mechanical- and mechanical manufacturer providing the full range of services in a product life cycle We offer flexible and cost effective…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Globetronics SDN BHDglobetronics.com.my HQ: Bayan Lepas, MalaysiaReported employees: 201-500 | Bayan Lepas, Malaysia | 201-500 | Exact match | 193 contacts → |
“Globetronics was started off by 2 ambitious entrepreneurs back in 1991 in a humble square feet rented facility.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Rohde & Schwarz Gmbh & Co. KGmemmingen.rohde-schwarz.com HQ: Memmingen, GermanyReported employees: 201-500 | Memmingen, Germany | 201-500 | Exact match | 189 contacts → |
“Rohde & Schwarz GmbH & Co.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | SFP Tech Holdings Berhadsfptechholdings.com HQ: Bukit Minyak, MalaysiaReported employees: 201-500 | Bukit Minyak, Malaysia | 201-500 | Exact match | 176 contacts → |
“An integrated engineering supporting service provider with a range of services from automated equipment solutions, fabrication process, CNC machining to sub-modular mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Matric Groupmatricgroup.com HQ: Seneca, PA, United StatesReported employees: 201-500 | Seneca, PA, United States | 201-500 | Exact match | 174 contacts → |
“Matric Group is a contract manufacturer of electronic assemblies, offering world-class Electronic Manufacturing Services (EMS) with personalized customer support, working closely…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | JOT Automationjotautomation.com HQ: Oulu, CA, FinlandReported employees: 201-500 | Oulu, CA, Finland | 201-500 | Exact match | 167 contacts → |
“As a world-leading custom test and assembly automation solutions provider, we create efficient, powerful and reliable solutions for the manufacturing of automotive, electric…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Opulentopulent-group.com HQ: Singapore, JapanReported employees: 501-1,000 | Singapore, Japan | 501-1,000 | Exact match | 166 contacts → |
“Since 2002, Opulent has been earning the trust of our clients and playing a pivotal role in their success through our complex manufacturing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | DFF Corporation, A Cadrex Companydffcorp.com HQ: Agawam, MA, United StatesReported employees: 201-500 | Agawam, MA, United States | 201-500 | Exact match | 142 contacts → |
“In 1969, DFF began serving customers with quality development and low-quantity production services-on time and at competitive prices.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Srxglobalsrxglobal.com HQ: Dandenong, AustraliaReported employees: 201-500 | Dandenong, Australia | 201-500 | Exact match | 140 contacts → |
“SRXGlobal, A Scanfil Company, provides a wide range of electronic manufacturing services, such as • Product Design Engineering, Prototyping/NPI • PCB Assembly (SMT, BGA, COB…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Assembly and testing services: dataset insights
November 6, 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
1,525 records in the displayed employee bands.
28 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 across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,553 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: November 6, 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 ↗
Assembly and testing services by location
10 lists · largest firstEvery Assembly and testing services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Assembly and testing services based in the United States374
- Assembly and testing services based in Germany148
- Assembly and testing services based in Italy123
- Assembly and testing services based in the United Kingdom100
- Assembly and testing services based in India65
- Assembly and testing services based in Brazil54
- Assembly and testing services based in Canada45
- Assembly and testing services based in Spain36
- Assembly and testing services based in France29
- Assembly and testing services based in Poland25
Questions about this company list
What does Exact match mean for assembly and testing services?
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 assembly and testing services did RevenueBase find worldwide?
The saved snapshot records 1,553 matching company records, 31,179 tracked contacts and 4,980 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: November 6, 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
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Cite this list
RevenueBase Data Team. Top 25 assembly and testing services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/assembly-and-testing-services.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗