Gusto (legally ZenPayroll, Inc.) is a company that provides a cloud-based payroll, benefits, and human resource management software for businesses based in the United States. Gusto handles payments to employees and contractors and also handles electronically the paperwork necessary to help client companies comply with tax, labor, and immigration laws. Gusto is operational in all 50 US states.

Gusto was part of Y Combinator's Winter 2012 batch. The service launched officially on December 11, 2012 in California by Joshua Reeves and Edward Kim.

Gusto's core product offering is payroll processing. As part of the core payroll product, Gusto offers employee onboarding (work authorization forms, direct deposit forms, employee information aggregation). Separately, Gusto offers employee health insurance, dental insurance, and vision insurance enrollment and administration. In addition, Gusto offers other employee-benefit and related products through third parties, including 401K and workers' compensation insurance.

In 2020, Gusto has built more than 50 new products in the last year directed toward helping small businesses. Releases included customizable payroll reports, a simplified PPP Loan Forgiveness tracker and a streamlined PPP application report that’s been downloaded more than 80,000 times to date. Nationwide, Gusto enabled more than $2.5 billion worth of approved PPP loans.

Gusto charges a per employee per month fee, similar to other software providers.

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