Firehouse Subs is a popular American fast-casual restaurant chain that specializes in hot subs and sandwiches. Established in 1994 by brothers Chris Sorensen and Robin Sorensen, who were former firefighters, Firehouse Subs has grown rapidly and gained a dedicated fan base. The chain not only offers a variety of delicious subs but also has a commitment to community service and supporting first responders, which is reflected in its firehouse-themed decor.