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The Diamond Certified Rating Process
Find out why our rigorous certification process of local companies is the most accurate in the Greater Bay Area.
How Diamond Certified Compares to Review Sites
See the key differences between the research-based rating system of the Diamond Certified Resource and the often-inaccurate ratings systems of other review sites.
The Diamond Certified Performance Guarantee
Learn how our powerful Performance Guarantee provides a valuable safety net and helps you choose with confidence.
Frequently Asked Questions
Gain insight on the guiding philosophies of the Diamond Certified Resource and get detailed answers to your questions about the program.
The Meaning of the Diamond Certified Symbol
Discover the meaning of the Diamond Certified symbol and learn which five principles it represents.