This document discusses how Kubernetes can be used to convert single-tenant software applications into multi-tenant SaaS applications. Key points include: 1) Kubernetes can orchestrate each tenant as a separate pod or set of pods, providing isolation, easy scalability, and the ability to customize deployments for each tenant. 2) This approach simplifies many challenges of traditional SaaS like customer management, billing integration, high availability, upgrades and rollbacks by leveraging Kubernetes features. 3) An initial test project converted an existing PHP/MySQL billing application for 10,000+ companies into a multi-tenant SaaS deployment using Kubernetes, requiring under 40 hours of development.