SaaS is everywhere. From finance and HR to engineering and marketing, SaaS apps now power the daily work of almost every team in your company, with employees driving SaaS adoption. By 2030, 80% of enterprise SaaS is expected to be business-led, meaning teams outside of IT will initiate, buy, and use apps independently, outside traditional procurement and security processes. However, as SaaS adoption skyrockets, most companies are operating without a clear strategy for securing it. There's a dangerous assumption that SaaS apps are secure “by default.” Spoiler alert: they’re not. This guide breaks down the essentials of SaaS security—what it is, where the risks are, and how to build a strategy that scales with your business. Whether you're just beginning to address SaaS security or seeking to fix what’s not working, we’ll show you how to improve your security without slowing down your business.