Mediterranean fast casual is the segment to watch, with four such chains on the list. This Maryland-based concept recently secured $30 million in funding to expand to NYC and Boston. Cava is known for its better-for-you, build-your-own-bowl vibe. And it uses tech to improve the guest experience: For example, motion sensors in the ordering line showed traffic jams near the menu board, which led to a redesign.

LocationRockville, Md.
2016 Systemwide Sales$26,800,000*
% Change in Sales76.3%
2016 U.S. Units25
% Change in Units92.3%
2016 Average Unit Volume$1,410,000*
% Change in AUV2.2%
Future 50 Year2017