Diamond Certified - (415) 884-2700

Each Diamond Certified company has been rated Highest in Quality in the most accurate ratings process anywhere. www.diamondcertified.org We support consumers with our Diamond Certified Performance Guarantee. www.diamondcertified.org/guarantee

Our ratings process of local companies is the most accurate in the Bay Area. Only those rated Highest in Quality in customer satisfaction earn Diamond Certified. We survey a large random sample of each company’s customers by telephone to get the most accurate ratings and verify only real customers are responding. This ensures the research results, good or bad, truly represent the company’s customer satisfaction level.

Our mission is to define excellence and identify the highest-quality local companies for consumers. Only companies that pass our rigorous survey of real customers earn the prestigious Diamond Certified award, signifying they have risen to the top of their fields. Our entire team is dedicated to ensuring consumers have confidence in the companies they choose. We’re committed to performing all ratings and ongoing certification work with the highest integrity and accuracy.

Tags: Research Service