Only companies rated
Highest in Quality
earn Diamond Certified.

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Accurate ratings. 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.

Highest in Quality. Our ratings process of local companies is the most accurate in the Bay Area. Companies must score Highest in Quality in customer satisfaction, a 90+ on a 100 scale, and pass all of our credential-based ratings. Most companies can't qualify.

Ongoing research. Companies must keep up their high performance. If they don't, they are removed from Diamond Certified. We never allow a Diamond Certified company to sit on its reputation.

Performance guarantee. We're proud to help you choose with confidence and prove it by backing your Diamond Certified transaction with the powerful Diamond Certified Performance Guarantee.

Refer a Company to Earn Diamond Certified

Thank you for helping us identify local companies that are good at satisfying customers. To qualify for Diamond Certified, companies must score Highest in Quality in customer satisfaction (a 90+ on a 100 scale) and pass all our credential-based ratings. Please select a button below to fill out a short form and we will contact the referred company to get permission to begin the rating process. Companies that are referred must qualify to earn Diamond Certified. Thank you for your help!