Check

Check is a New York-based fintech that provides embedded payroll infrastructure, letting software platforms build and sell their own payroll product through a single API. It handles the hard parts - tax calculation, money movement, tax filing, and multi-state compliance - so vertical SaaS, HR, and workforce-management companies can offer payroll without becoming payroll experts. Backed by Stripe, Thrive, Bedrock and Index, Check powers payroll for platforms like Wave, Homebase, Housecall Pro and 7shifts.