AI Visibility Index: Contract Manufacturing & Assembly in California

When a buyer asks an AI assistant for a contract manufacturing & assembly supplier in California, these are the companies that get named. This is what we found when the cell was last measured.

309 companies tracked
Last measured September 30, 2026
Next measurement October 30, 2026

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The headline numbers

Never named by AI

274 of 309

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

35 named at least once
274 never named

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Cell average: 0.25of 15
Across all 309 tracked companies.
Top ten average: 5.2of 15
The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in California

These are the companies AI assistants named most often when California buyers went looking for a supplier in this category.

Top 10 most AI-visible Contract Manufacturing & Assembly companies in California, measured September 30, 2026
Rank	Company	Location	AI visibility
1	ABX Engineering, Inc. 72 employeesBurlingame, California	Burlingame, California	9 of 15 answers
2	Spectrum Assembly Inc 15 employeesCarlsbad, California 3 name variants Spectrum Assembly Inc. (SAI)most common3 Spectrum Assembly, Inc.2 Spectrum Assembly (SAI)1	Carlsbad, California	6 of 15 answers
3	Calpak USA California	California	6 of 15 answers
4	Golden West Technology 60 employeesFullerton, California	Fullerton, California	5 of 15 answers
5	Indtec 20 employeesMarina, California	Marina, California	5 of 15 answers
6	CalWest Solutions California	California	5 of 15 answers
7	Applied Engineering 70 employeesSan Jose, California	San Jose, California	4 of 15 answers
8	Cal Quality Electronics 180 employeesSanta Ana, California 2 name variants Cal Quality Electronics / PARPRO Technologiesmost common2 Cal Quality Electronics2	Santa Ana, California	4 of 15 answers
9	Sanmina Corporation 56 employeesSan Jose, California 2 name variants Sanminamost common3 Sanmina Corporation1	San Jose, California	4 of 15 answers
10	Meritek EMS California	California	4 of 15 answers

57 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not California. They belong to that state's ranking, not this one.

Company	State	Mentions
Carr Manufacturing Company (CMC)	Texas	4 of 15
Kelytech	Michigan	4 of 15
CLEAR	New York	3 of 15
CLEAR Manufacturing	Florida	3 of 15
Nichols Manufacturing	Oregon	2 of 15
CTD-USA	Colorado	1 of 15

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A complete Blue Book listing is one of the sources assistants read in this category. Confirming your details is free.

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The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

1“Best contract manufacturing and assembly companies in California”
2“Who supplies turnkey contract manufacturing and assembly for boxed consumer electronics in California”
3“I need a California contract manufacturing and assembly partner for a 25,000 unit electromechanical product launch, who should I talk to”
4“Top contract manufacturing and assembly suppliers in California for OEM operations buyers”
5“Which California contract manufacturers and assemblers can handle mixed-model production with final packaging and labeling”
6“List 20 contract manufacturing and assembly companies in California with their specialties.”the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

projecta.ai
7 companies
thomasnet.comDirectory
6 companies
en.wikipedia.orgDirectory
3 companies
saicorp.com
3 companies
clearmfg.com
3 companies
maccal.com
3 companies
calquality.com
2 companies
aqs-inc.com
2 companies
electronicsandyou.com
2 companies
geamfg.com
2 companies
hitem.com
2 companies
nicholsmfg.com
2 companies

80 sources were cited across this cell's answers from 67 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

California in context

California ranks 14th of 15 measured states in this category. Each bar is the share of that state's tracked companies that AI assistants named at least once; across every measured state in this category the share is 19%.

California (this report)Other measured statesCategory average (19%)

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