About Krystal Restaurants LLC Headquartered in Atlanta, GA, Krystal Restaurants LLC is the original quick-service restaurant chain in the South. Krystal hamburgers have been served fresh and hot off the grill on the iconic square bun since 1932. The company proudly sticks to the classics, but over the years, they’ve never been afraid to innovate. In 2019, the company was selected to USA Today’s Top-10 Best Regional Fast Food List. For more information, visit krystal.com or follow on Facebook and Instagram.