Blue Book

AI Visibility Index · Cell report

Measured

AI Visibility Index: Aluminum Fabrication in California

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

  • 128 companies tracked
  • Last measured September 30, 2026
  • Next measurement October 30, 2026
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The headline numbers

Never named by AI

102 of 128

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.

  • 26 named at least once
  • 102 never named
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Cell average
0.28of 15

Across all 128 tracked companies.

Top ten average
3.4of 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 Aluminum Fabrication companies in California, measured September 30, 2026
RankCompanyAI visibility
1
PEN Manufacturing
California
2 name variants
  • PEN Manufacturingmost common8
  • Pen Manufacturing (PEN‑MFG)1

9 of 15 answers

2
Bandel Manufacturing
24 employeesLos Angeles, California
2 name variants
  • Bandel Manufacturingmost common2
  • Bandel Mfg., Inc.1

3 of 15 answers

3
Paramount Extrusions Co
30 employeesParamount, California
2 name variants
  • Paramount Extrusionsmost common2
  • Paramount Extrusions Company1

3 of 15 answers

4
Calpak USA
California

3 of 15 answers

5
HWG Machine
California

3 of 15 answers

6
IronLogic Manufacturing
California

3 of 15 answers

7
K&S Welding Fab
California

3 of 15 answers

8
Sanmina – Fremont Enclosure Facility
California

3 of 15 answers

9
Compucraft Industries Inc
60 employeesSantee, California

2 of 15 answers

10
Freeberg Industrial Fabrication Corp.
85 employeesEscondido, California

2 of 15 answers

61 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.

CompanyStateMentions
Bay Machine and FabricationPuerto Rico2 of 15
CLEAR ManufacturingFlorida2 of 15
Aluminum Precision Products (APP)Louisiana1 of 15
ESA FabricationArizona1 of 15
K Metal Work & DesignIllinois1 of 15
Kelly ManufacturingKansas1 of 15

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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. 1“Best aluminum fabrication companies in California”
  2. 2“Who supplies custom fabricated aluminum frames in California”
  3. 3“I need a California aluminum fabrication partner for a 5,000-unit enclosure project, who should I talk to”
  4. 4“Top aluminum fabrication suppliers in California for industrial equipment buyers”
  5. 5“Which California aluminum fabricators can handle TIG welding and CNC machining of complex assemblies”
  6. 6“List 20 aluminum fabrication 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.

  • americanmachineworx.com
    3 companies
  • pen-mfg.com
    2 companies
  • andersenmp.com
    2 companies
  • proprecisionmetalfabricating.com
    2 companies
  • sanmina.com
    2 companies
  • bandel.com
    2 companies
  • bay-machine.com
    2 companies
  • cdecases.com
    2 companies
  • oemprecision.us
    2 companies
  • paramountextrusions.com
    2 companies
  • rocklinmetal.com
    2 companies
  • smsfab.com
    2 companies

79 sources were cited across this cell's answers from 74 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 6th of 10 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 21%.

California (this report)Other measured statesCategory average (21%)

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More published reports in California