The Diamond Certified Difference

If you want quality, you’ll have confidence in choosing a Diamond Certified company. 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. Most companies can't qualify.

Every Diamond Certified company must continue to deliver on its promises to you, the consumer. That's why we conduct ongoing customer satisfaction research, credential-based ratings, and monitor each company's performance. Then we back you up with mediation and the Diamond Certified Performance Guarantee.

Our Ratings are the Most Accurate Anywhere

We survey a large random sample of each company's customers by telephone to get the most accurate ratings and to verify that only REAL customers are responding. By surveying from a company's entire customer base, we ensure that the research results, good or bad, truly represent the company's customer satisfaction level.

Only the Best Pass the Test™

Companies must score Highest in Quality in customer satisfaction, a 90+ on a 100 scale, and pass all of our credential-based ratings. By requiring such a high score to qualify, we cut out mediocre and poorly performing companies.

Companies are Held Accountable

We conduct ongoing research and ratings. 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. Each must do their best to satisfy you, the customer.

We're Here for You

We care about customer satisfaction, and we care about you. That's why we perform the most accurate ratings, require the highest standard for qualification, and conduct regular performance reviews of Diamond Certified companies. We're proud to help you choose with confidence and we prove it by backing your Diamond Certified transaction with the powerful Diamond Certified Performance Guarantee.