New investment values the company at about $2 billion, twice its valuation from three years ago. : New York: Payroll and benefits start-up Gusto is raising $140 million from investors in a round that nearly doubles its previous funding total. The new investment values the company at about $2 billion, twice its valuation from three years ago. The funding round was led by T. Rowe Price Associates Inc., Y Combinator Continuity Fund and General Catalyst. The company, founded in 2011, offers payroll and benefit services to small- and medium-sized businesses in the US.