Abacus, Zeal's (formerly Puzzl) Gross-to-Net Calculation API, lets developers access compliant payroll calculations for all 50 states and territories in the United States via a simple API.

Zeal (formerly Puzzl) helps platforms embed payroll into their product. Through our white-label components, payroll API, internal tools, and 35+ payroll features, we give platforms every piece they need to successfully build and manage a payroll product.