The Blue Book record
America's industrial directory, now read by AI too
Every US industrial company in the record is listed under one or more of these 3,224 categories. Choose one below to see how AI assistants answer buyers looking for a supplier in it, state by state.
The record, by the numbers
536,645
Companies listed
3,224
Industry categories
45
Index cells published
Latest finding
Air Compressors in Texas
11 of 103 companies named
Measured September 25, 2026Read the finding
How to use the directory
Step 1
Find your industry
Search or browse the categories below. Every company in the record is listed under at least one.
Step 2
Choose a state
One category in one state is one cell of the AI Visibility Index.
Step 3
See who AI names
Each published cell shows which companies AI assistants name when a buyer asks for a supplier.
Browse all categories
Categories are listed A to Z. Choose one to pick a state and open its AI Visibility report.
3,224 categories
marks a category with a published Index report for at least one state.The number beside each category is how many companies it lists.