37signals

37signals is a privately held web application company headquartered in Chicago, Illinois, USA. The company was co-founded in 1999 by Jason Fried, Ernest Kim, Carlos Segura and others.

37signals' mission is to "help people work better" and it focuses on developing simple, dedicated software to help users collaborate and organize teams. Its main products include Basecamp, Backpack, Campfire and Highrise.

37signals is famous for its efficient working style and innovative management model. All employees are doers, there is no middle-level management, and employees are free to choose their office location and allocate their working hours. The company continues to maintain simplicity and high efficiency, refuses to expand blindly, and trusts employees. As long as the work tasks are completed, no one cares how many days a week they work.

In addition, 37signals is also one of the most efficient software companies in the world, serving millions of users worldwide and earning millions of dollars a year.