Industries with historically low software adoption (like trial law or dentistry) are now viable markets. Instead of selling a tool, AI startups are selling an outcome—the automation of a specific labor role. This shifts the value proposition from a software expense to a direct labor cost replacement.

AI enables "software does labor" business models in industries previously deemed too small for specialized software, like dental offices or trial law. By replacing or augmenting specific labor tasks, startups can justify high-value contracts in markets that historically wouldn't pay for traditional SaaS tools.

AI tools for law firms, like Harvey, are priced to capture a portion of the firm's labor budget, not just its software spend. With an average contract value near $200,000, Harvey is effectively selling a replacement for a human lawyer, accessing a much larger market.

The primary economic incentive driving AI development is not replacing software, but automating the vastly larger human labor market. This includes high-skill jobs like accountants, lawyers, and auditors, representing a multi-trillion dollar opportunity that dwarfs the SaaS industry and dictates where investment will flow.

The true market opportunity for AI is not merely replacing existing software but automating human labor. This reframes the total addressable market (TAM) from the ~$400 billion global software industry to the $13 trillion US-only labor market, representing a thirty-fold increase in potential value.

Industries historically slow to adopt software are now rapidly embracing AI. Unlike rigid workflow tools, AI excels at parsing dense text and augmenting the nuanced, unstructured work common in these fields. This allows new AI vendors to gain traction without needing to rip-and-replace legacy systems of record like EHRs.

Within the last year, legal AI tools have evolved from unimpressive novelties to systems capable of performing tasks like due diligence—worth hundreds of thousands of dollars—in minutes. This dramatic capability leap signals that the legal industry's business model faces imminent disruption as clients demand the efficiency gains.

AI is transforming business models by enabling companies to sell software bundled with the actual work it performs. This "work-as-a-service" approach is unlocking historically software-resistant markets like legal and construction, where the value proposition is the completed task, not just the tool.

Don't underestimate the size of AI opportunities. Verticals like "AI for code" or "AI for legal" are not niche markets that will be dominated by a few players. They are entire new industries that will support dozens of large, successful companies, much like the broader software industry.