Square provides an intuitive and comprehensive POS solution for small businesses to handle customer transactions. Their product line includes card readers, stands, and registers that integrate software for invoicing, payments, and payroll. While Square is not yet profitable, it has high expected growth rates and low debt levels. Founded in 2009, Square has received several rounds of funding, integrated with Starbucks in 2012, and went public in 2015. The company's "secret sauce" is the intuitive design of its hardware and software that provides small businesses with an easy to use all-in-one solution.