While there is no easily accessible information comparing acid levels of all known coffee brands, there are brands advertised as low acid. Some popular ones on Amazon.com include Puroast, HealthWise and Folgers Simply Smooth. These brands use beans processed and roasted in a unique way that reduces the acid content.
Many people like the taste of low acid coffee, but some find it too bitter. Cold brewing is another option for reducing the acid content in coffee and results in a smoother taste. Cold brew coffee makers come in various styles and prices. The cold brewing process typically takes 12 hours and results in a concentrate that is diluted to taste or used full-strength as a flavoring in cooking. Ready-made options such as Cool Brew Fresh Coffee Concentrate and Trader Joe's Cold Brew Coffee Concentrate are convenient when an instant alternative is preferred. Both cold brew coffee makers and instant coffee concentrates can be found on Amazon.com.
When making a lower acid coffee using either a hot or cold brewing method, consider checking the product label for the type of bean used. Arabica and Robusta are two common species of coffee beans. Arabica beans are lower in acid than Robusta beans.