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Products & Services
About Rule
At Rule of 3, we uncover and amplify the big idea that ignites your brand. Engage directly with thinkers who've cut their teeth on the West Coast's most high-profile brands.
Its primary NAICS classification is 541810 (Advertising Agencies). Rule is one of 2,121,238 Industrial & mechanical companies listed in California.
Business Contact Information
- Phone
- +1 (415) 3023424
- Website
- ro3sf.com
- facebook.com/ro3sf
- Address
- 23 Madera Ave, San Anselmo, California, 94960, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 54Professional, Scientific, and Technical Services
- 5418Advertising, Public Relations, and Related Services
- 541810Advertising Agencies
SIC Codes
- 73Business Services
- 731Advertising
- 7311Advertising Agencies
Company Details
- Employees
- 9 (6-10)
- Annual Revenue
- $1.4M ($1M-$5M)
Rule: frequently asked questions
What does Rule do?
At Rule of 3, we uncover and amplify the big idea that ignites your brand. Engage directly with thinkers who've cut their teeth on the West Coast's most high-profile brands.
Where is Rule located?
Rule is headquartered at 23 Madera Ave, San Anselmo, California, 94960, United States.
How many employees does Rule have?
Rule has about 9 employees (the 6-10 range).
What is Rule's annual revenue?
Rule's annual revenue is estimated at $1.4M (the $1M-$5M range).
What industry is Rule in?
Rule is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 541810 (Advertising Agencies).
How can I contact Rule?
Its website is ro3sf.com and its phone number is +1 (415) 3023424.
What companies are similar to Rule?
Other large industrial & mechanical companies in California include State of California, TD SYNNEX Corp, University of California and Ingram Micro Holding Corp.
Largest industrial & mechanical companies in California
Largest companies in California
Largest industrial & mechanical companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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