Essai, Inc.
Essai, Inc. developed high-performance PCB, socket, thermal control, and Invisipin® elastomer-pin interconnect solutions for semiconductor manufacturers' device, wafer, and component testing. Founded in 2003 in Fremont, CA, it was acquired by Advantest in 2021 and now operates as part of Advantest Interconnect Solutions.
- Company typePrivate
- Founded2003
- HeadquartersFremont, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Essai, Inc. does
Essai, Inc. is a Fremont, California-based electronic manufacturing company founded in 2003 that developed high-performance and high-density interconnect solutions for the semiconductor test industry. Its product portfolio centered on printed circuit boards, substrates, test sockets, thermal control units, and the proprietary Invisipin® elastomer-pin technology family, which the source describes as the first solderable elastomer pin offering high precision, low loss, and cost performance across digital, power, and RF applications. The company's primary customer segment was semiconductor manufacturers requiring device testing, wafer test, component test, and system level test interfaces, with an emphasis on custom, engineering-collab-driven solutions rather than standardized catalog products.
In 2021, Essai's products were acquired by Advantest Corporation and integrated, together with R&D Altanova products, into a new product unit called Advantest Interconnect Solutions (AIS). As a result, Essai no longer operates as an independent commercial entity; its offerings are now marketed as part of the AIS portfolio and distributed through Advantest's global sales and support network spanning the Americas, Europe, Japan, Korea, Taiwan, China, and Southeast Asia. The AIS unit positions Essai's interconnect technologies alongside Advantest's automated test equipment, handlers, probers, and cloud solutions to deliver end-to-end test cell capabilities. Pricing is custom/enterprise and not publicly disclosed, and the business model functions as a specialized component supplier within a much larger parent ecosystem rather than as a standalone revenue-generating company.
Essai, Inc. firmographics
Firmographics- Name
- Essai, Inc.
- Website
- https://essai.com
- Company type
- Private
- Founded year
- 2003
- Operating status
- Acquired
- Headcount range
- 51–100 employees
- Short description
- Essai, Inc. developed high-performance PCB, socket, thermal control, and Invisipin® elastomer-pin interconnect solutions for semiconductor manufacturers' device, wafer, and component testing. Founded in 2003 in Fremont, CA, it was acquired by Advantest in 2021 and now operates as part of Advantest Interconnect Solutions.
- Ownership category
- akta.pro rank
Essai, Inc. industry classification
Industry- Product category
- Semiconductor Test Interconnect Solutions
- NAICS
- Electronic Connector Manufacturing (334417), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Semiconductor Machinery Manufacturing (333242)
- SIC
- Electronic Connectors (3678), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)
- akta.pro primary industry
- Sockets, IC Sockets & Test/Programming Interconnects (HDAHAOAF)
- akta.pro secondary industries
- Package Substrates & Interposers (ABF/BT, Silicon/Glass) (HDAHADAE), Test, Probe & Burn-In Equipment (Wafer Sort/Final Test) (HDAHAEAJ), Connectors & Interconnect Components (Industrial connectors, terminals, sockets, backplane) (IMAGAJAC)
Keywords
Where Essai, Inc. is headquartered
LocationHeadquarters
- HQ city
- Fremont
- HQ country
- United States
- HQ region
- North America
Markets served
Essai, Inc. business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Personnel, Operations, Infrastructure
Distribution channels1 record
Essai, Inc. product offering
Product offeringCore offering
Essai, Inc. designs and manufactures high-performance interconnect solutions for semiconductor testing, including test interface boards (PCBs), substrates, test sockets, thermal control units, and the proprietary Invisipin® series of elastomer pin interconnects. Its products serve semiconductor manufacturers during device design, validation, wafer test, component test, and system level test phases. Since 2021, Essai's products have been integrated into Advantest Corporation's Advantest Interconnect Solutions™ (AIS) product unit.
Product overview
Advantest Interconnect Solutions™ (AIS) is an integrated product unit that develops and provides high-performance and high-density printed circuit boards (PCBs) and accessories, including test sockets and thermal control units. This unified ecosystem combines R&D Altanova and Essai products into a comprehensive portfolio of interconnect solutions. The product line includes Test Interface Boards (connecting test systems and sockets), Substrates (linking test boards to probe heads for wafer test), Test Sockets (mounting semiconductor devices during test), and Thermal Control Units (regulating temperature during testing). The Invisipin® Series provides advanced device interface solutions including solderable elastomer pins, board-to-board interconnects, and test sockets with high precision, low loss, and cost performance.
Differentiator
Problem solved
Functional benefit
Products and services
- Test Interface Boards
- Substrates
- Test Sockets
- Thermal Control Units
- Invisipin® Solderable
- Invisipin® Board to Board Interconnect
- Invisipin® Test Sockets
Companies that use Essai, Inc.
Customer profileSegments1 record
Ideal customer profiles1 record
Essai, Inc. technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Essai, Inc. partnerships and signals
Strategic signalRecent moves4 records
Expansion highlights4 records
Essai, Inc. competitors and assessment
Company assessmentDirect peers
- R&D Altanova: Direct peer now co-located with Essai inside Advantest Interconnect Solutions. R&D Altanova is the other foundational product line of AIS, specializing in high-performance test interface boards (PCBs) and substrates for wafer and final test — directly overlapping Essai's PCB and substrate offerings before the Advantest integration.
- Smiths Interconnect: Specialist in high-reliability interconnect products, including test sockets, probe pins, and contact technologies used in semiconductor and aerospace test. Smiths competes directly with the Invisipin® and board-to-board interconnect product families in the test socket market.
- Yokowo: Japanese manufacturer of precision test sockets and spring probes for semiconductor final test. Yokowo's vertical product focus and customer overlap with global IDMs and OSATs place it as a primary direct competitor to Essai's test socket line.
- Leeno Industrial: Korean specialist in test sockets, contact probes, and ATE interface components serving memory and logic test customers globally. Leeno is a leading independent supplier of IC test sockets and a direct head-to-head competitor for advanced-package test interface solutions.
- ISC (ISA) Co., Ltd. Korea-based manufacturer of test sockets and burn-in sockets for memory and logic semiconductor test. ISC supplies global IDMs and is a direct competitor in the IC test socket niche that Essai/AIS serves.
- Johnstech International: Long-standing US-based test contactor specialist serving analog, mixed-signal, and RF semiconductor test markets. Johnstech's precision contact technology and customer overlap with global ATE users make it a direct peer in the high-performance test contactor niche.
Broad incumbents
- Cohu: Diversified semiconductor test equipment and handler incumbent whose interface board, contactor, and thermal management product lines directly compete with Essai/AIS. Cohu's recent acquisitions of PCB test interface specialists (e.g., Xcerra-era assets) make it one of the closest scaled competitors in the interconnect space.
- Teradyne: Largest ATE competitor to Advantest and a major consumer/influencer of test interconnect technology. While Teradyne does not sell sockets at Essai's scale, its tester platforms drive the architectural specs and demand baseline for the entire interface ecosystem, making it both a demand driver and a competitive threat.
Emerging players
- Translarity: Emerging specialist in advanced test sockets and contact technologies, including MEMS and elastomer-based solutions targeting advanced packaging and chiplet test. Translarity overlaps with Essai's Invisipin® elastomer architecture and competes for next-generation socket designs.
- Feinmetall: Specialist in precision contact probes and test contactors for semiconductor wafer and component test. Feinmetall competes with Essai at the probe and contact interface layer, particularly in European automotive and industrial semiconductor markets.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights5 records
Customer concentration
Essai, Inc. social profiles
Digital presenceEssai, Inc. financial estimates
Financial estimateRevenue estimate
Valuation estimate
Essai, Inc. leadership team
Management profileNumber of profiles
Essai, Inc. funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Essai, Inc. M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Essai, Inc.
What does Essai, Inc. do?
Essai, Inc. designs and manufactures high-performance interconnect solutions for semiconductor testing, including test interface boards (PCBs), substrates, test sockets, thermal control units, and the proprietary Invisipin® series of elastomer pin interconnects. Its products serve semiconductor manufacturers during device design, validation, wafer test, component test, and system level test phases. Since 2021, Essai's products have been integrated into Advantest Corporation's Advantest Interconnect Solutions™ (AIS) product unit.
Is Essai, Inc. a public or private company?
Essai, Inc. is a private company. It is classified as corporate owned and is currently acquired.
When was Essai, Inc. founded?
Essai, Inc. was founded in 2003. It employs 51 to 100 people.
Where is Essai, Inc. based?
Essai, Inc. is headquartered in Fremont, United States, in the North America region.
Who are Essai, Inc.'s main competitors?
Direct peers on record are R&D Altanova, Smiths Interconnect, Yokowo, Leeno Industrial, ISC (ISA) Co., Ltd. and Johnstech International. Broad incumbents are Cohu and Teradyne. Emerging players are Translarity and Feinmetall.
Does Essai, Inc. have an API?
No public API is recorded for Essai, Inc..
What industry is Essai, Inc. in?
Essai, Inc.'s product category is Semiconductor Test Interconnect Solutions. Its primary akta.pro industry code is HDAHAOAF, Sockets, IC Sockets & Test/Programming Interconnects, with a secondary code of HDAHADAE, Package Substrates & Interposers (ABF/BT, Silicon/Glass). Its NAICS code is 334417 and its SIC code is 3678.