Diamond Certified
> Accurate Ratings
How It Works
Our rigorous rating and certification process starts with the in-depth pass/fail rating of each company’s customer satisfaction, license and insurances. We survey a large, random sample of real customers by telephone to get the most accurate rating and verify only actual customers are responding. By surveying from a company’s entire customer base, we ensure the results of our study, good or bad, truly represent the company’s customer satisfaction level.
Ratings Process
American Ratings Corporation conducts accurate customer satisfaction research. Find out why our rigorous certification process of local companies is the most accurate in the Greater Bay Area.
Performance Guarantee
We stand behind our work by backing each of your purchases with the powerful Diamond Certified Performance Guarantee. If you’re dissatisfied with the performance of a Diamond Certified company and try unsuccessfully to resolve the issue, we’re here to help.