Firehouse Subs is a U.S.-based, fast casual restaurant chain founded in 1994 in Jacksonville, Florida by former firefighter brothers Robin and Chris Sorensen. Firehouse Subs has opened over 1,170 restaurants in 45 states as well as Puerto Rico and Ontario, Canada.In 2005, Chris and Robin Sorensen created the Firehouse Subs Public Safety Foundation providing funding, life-saving equipment and educational opportunities to first-responders and public safety organizations.