Arlington, 51 employees
Capterra is an open office in every sense: All 51 staffers work in one big space, and all company information, including financials, is shared at monthly all-hands meetings. A free online service that helps businesses pick software, Capterra has a young staff—average age 28—that likes to get together to play Ping-Pong, Ultimate Frisbee, and laser tag. There are also some very mature benefits, including fully paid health-care premiums, paid parking or Metro fare, unlimited time off, and profit sharing.
Perk: A five-week paid sabbatical every five years.