AI Visibility Index: Stainless Steel Fabrication in California

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

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

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The headline numbers

Never named by AI

140 of 156

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.

16 named at least once
140 never named

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Cell average: 0.22of 15
Across all 156 tracked companies.
Top ten average: 4.8of 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 Stainless Steel Fabrication companies in California, measured September 30, 2026
Rank	Company	Location	AI visibility
1	Santa Rosa Stainless Steel 45 employeesSanta Rosa, California 2 name variants Santa Rosa Stainless Steelmost common5 Santa Rosa Stainless Steel (SRSS)3	Santa Rosa, California	8 of 15 answers
2	Custom Tank Fabrication California 2 name variants Custom Tank Fabrication, Inc.most common4 Custom Tank Fabrication4	California	8 of 15 answers
3	Sonoma Stainless California 2 name variants Sonoma Stainless, Inc.most common3 Sonoma Stainless3	California	6 of 15 answers
4	So-Cal Fab & Supply, Inc. 125 employeesGarden Grove, California 2 name variants So-Cal Fab & Supplymost common3 So-Cal Fab & Supply, Inc.2	Garden Grove, California	5 of 15 answers
5	Diamond Weld Industries Inc. California	California	4 of 15 answers
6	Sanitary Stainless Services California 2 name variants Sanitary Stainless Servicesmost common3 Sanitary Stainless Services, Inc.1	California	4 of 15 answers
7	Stainless Aesthetics Inc. California	California	4 of 15 answers
8	US Precision Sheet Metal Inc 68 employeesRiverside, California	Riverside, California	3 of 15 answers
9	Gee Manufacturing California	California	3 of 15 answers
10	JPI Welding California 2 name variants JPI Welding – Sunnyvalemost common2 JPI Welding1	California	3 of 15 answers

46 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
Laser Tech	Georgia	3 of 15
Flow Systems LLC	Colorado	2 of 15
Peterson Custom Stainless	Wisconsin	1 of 15
Quality Sheet Metal Fabrication	Florida	1 of 15
Stainless Steel Fabricators, Inc.	North Carolina	1 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“Best stainless steel fabrication companies in California”
2“Who supplies custom stainless steel process tanks with welded fittings in California”
3“I need a California stainless steel fabrication partner for a short-run sanitary equipment build, who should I talk to”
4“Top stainless steel fabrication suppliers in California for food and beverage plant engineering buyers”
5“Which California stainless steel fabricators can handle TIG welding of thin-gauge stainless assemblies”
6“List 20 stainless steel 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.

dciinc.com
3 companies
sonomastainless.com
2 companies
srss.com
2 companies
customtankfabrication.com
2 companies
j-jproducts.com
2 companies
jpi-welding.com
2 companies
precisionmanufacturers.com
2 companies
sanitarystainless.net
2 companies
scfabandsup.com
2 companies
smsfab.com
2 companies
placerprocesssystems.com
1 company
stainlessaestheticsinc.com
1 company

64 sources were cited across this cell's answers from 60 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 11th of 12 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 15%.

California (this report)Other measured statesCategory average (15%)

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