Paychex

ADP (Automatic Data Processing, Inc.) is an American company that provides payroll, human resources, tax and benefits administration services. It offers cloud-based payroll processing, HR management, time and attendance, tax compliance, and workforce analytics for businesses of various sizes.

Gusto (formerly ZenPayroll) is an American company that provides cloud-based payroll, benefits administration, and human resources software for small and medium-sized businesses. The platform automates payroll processing, tax filings, employee onboarding, and benefits management and is headquartered in San Francisco, California.

Workday, Inc. is a US-based enterprise software company that provides cloud-native human capital management (HCM), financial management, payroll, talent management, planning, and analytics applications delivered as multi-tenant SaaS. Workday tenant instances ingest employee records, payroll and financial transactions, time and absence data, recruiting and compensation inputs and produce HR and finance ledgers, payroll runs, regulatory filings, operational reports and dashboards; integrations and data exchange use Workday Studio, Enterprise Interface Builder (EIB), SOAP/REST APIs and prebuilt connectors for SSO and ERPs. Founded in 2005 by Aneel Bhusri and Dave Duffield, Workday is commercially licensed enterprise software that includes machine-learning features and an assistant/chat capability but is primarily an enterprise SaaS platform.

Printful is a print-on-demand fulfillment and dropshipping service for creating and selling custom products online. It produces and ships items such as apparel and accessories on behalf of sellers, allowing them to operate stores without holding inventory.

**Stripe** is a financial technology company that provides online payment processing software and APIs for businesses of all sizes. Founded in 2010 by Irish brothers Patrick and John Collison, it lets companies accept payments, manage subscriptions and billing, handle tax compliance, prevent fraud, and access treasury and banking tools. Headquartered in South San Francisco and Dublin, it remains privately held.