Enterprise SaaS refers to cloud-based, subscription-model software designed for the complex, high-security, and high-scalability needs of large organizations (often 1,000+ employees), as detailed on the DataCose blog. While regular SaaS provides standardized, easy-to-use tools for individuals or smaller teams, Enterprise SaaS offers deep customization, high security, advanced compliance, and complex integration capability, according to the Jackrabbit Mobile blog.