CONCEPT
The SaaS Business Model
The subscription software model that dominated enterprise technology for two decades — built on the assumption that software is expensive to write, and now being repriced by an AI revolution that has cracked that assumption.
Software-as-a-Service emerged as the dominant commercial model for enterprise software in the 2000s and 2010s, replacing the earlier perpetual-license model. Its economic logic was specific: software is expensive to develop but cheap to distribute, so the efficient structure is to amortize the development cost across a large base of paying subscribers rather than requiring each customer to pay the full cost upfront. Companies like Salesforce, Workday, Adobe, and Atlassian built extraordinary market capitalizations on this model, reaching aggregate valuations of trillions of dollars by the mid-2020s. The AI revolution that began in late 2022 cracked the foundational assumption on which the model rested, and the market's repricing — what the financial press called the SaaSpocalypse — began in earnest in early 2026.
In The You On AI Field Guide
The SaaS model worked because the assumption held. Writing enterprise software required large teams of specialized developers, years of effort, and millions of dollars of investment.