About Us

Who We Are and What We Believe

Our dedicated team has decades of experience rating and certifying local companies on behalf of consumers. Only companies that score Highest in Quality and Helpful Expertise® in rigorous surveys of verified real customers earn the prestigious Diamond Certified award. Only the Best Pass the Test®. Above, our team celebrates the milestone of 10 million Diamond Certified Directories published and mailed to consumers throughout the Greater Bay Area. Photo: American Ratings Corporation, 2017

Our mission is to define excellence and identify for consumers the highest quality local companies. Our founders pioneered rating local companies based on customer satisfaction in 1990, back before the web existed. Our home, like yours, is the Greater Bay Area and our entire team is dedicated to ensuring you have confidence in the companies you choose. We are committed to performing all ratings and ongoing certification work with the highest integrity and accuracy.

We believe:

  1. You the consumer have the right to know which companies are truly performing at the highest level of quality.
  2. The highest quality companies should be rewarded for their ongoing performance through public recognition.
  3. Companies should be held accountable for their performance, one customer at a time.

We only allow a limited amount of companies to earn Diamond Certified. In fact, only a handful of companies are able to qualify in most industries, and these we re-rate on an ongoing basis to assure you that they stay the best. And of course we always back you up with our powerful Diamond Certified Performance Guarantee.


Go to The History of Diamond Certified

  • Chris Bjorklund

    Consumer Advocate

  • Greg Louie

    Founder and Chief Executive Officer

  • Joy Lanzaro

    Director of Mediation and Compliance

  • David Pak

    Director of Ratings

  • Olivia Bustos

    Director of Finance and Service

  • Matt Solis


  • Char Leary

    Director of Production

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 and Helpful Expertise® (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!