Zellis is a software company based in the United Kingdom, specializing in human resources software and corporate services. Founded in 1963, the company has grown to employ between 1,001 and 5,000 individuals and reported revenues of approximately $420 million. Zellis focuses on providing payroll solutions tailored for multi-academy trusts (MATs), addressing the complexities and compliance demands associated with managing payroll across multiple educational institutions. The company emphasizes the importance of selecting a payroll provider that understands the specific needs of MATs, including real-time reporting capabilities, automated compliance for Teachers' Pensions, and support for various reporting requirements. Their published materials, such as the "Multi-Academy Trust Payroll Checklist," guide potential clients in evaluating payroll providers by highlighting essential features like data migration, sector expertise, and the ability to manage multiple contracts and pension schemes. Zellis aims to simplify payroll processes, thereby allowing educational leaders to focus on improving pupil outcomes rather than dealing with payroll errors and compliance issues.