Glossary
SaaS sprawl
The accumulation of software subscriptions past the point where anybody can list them from memory. The count grows because adding a tool is easy and removing one is nobody's job.
Why is SaaS sprawl expensive?
Because the total goes unexamined, even when no single subscription is large. Sprawl is the condition that lets zombie subscriptions, duplicate tooling, and price creep persist: each is individually small, and there is no list to check them against.
Where is the real list of what a company pays for?
The general ledger. The SSO directory holds only the tools that federate, the card statement only the tools on the card, and the app catalog only the tools somebody remembered to add. Everything the company pays for has to be recorded somewhere in the books, because that is what bookkeeping is for.
Every term in this glossary is defined from the general ledger, because that is the one place a company's whole software estate is already written down. See how a software spend audit reads a ledger for what that involves.