The Takeaway: The internet is shifting from human-first to agent-first, and that rewrites fraud, billing, and trust.
- Fraud is no longer just stolen cards at checkout; in AI, attackers steal compute, credits, and unpaid usage across the whole customer lifecycle.
- The old SaaS playbook breaks fast: free trials, virtual cards, and seat-based pricing all become leaky when every prompt and API call has real cost.
- Stripe’s edge is breadth: it’s pushing fraud detection upstream into sign-up, and across payment methods, processors, and even agent commerce.
Emily, Stripe’s head of data and AI, frames the shift bluntly: “the Internet has this new kind of actor on it.” Her point isn’t that AI is making websites smarter; it’s that agents are becoming the dominant users of the web, and every layer of the stack has to adapt. That means payments, identity, fraud, billing, and developer tools all need to be rebuilt for software that acts on behalf of people—or directly with other software.
The most immediate pain is fraud. In AI businesses, the thing being stolen isn’t just money; it’s expensive inference. Emily says fraudsters are abusing free trials, spinning up multi-accounts, and racking up unpaid usage. One company saw only 4% of free trials convert, while each trial cost $25 in LLM spend—turning into “$625 per payer” before revenue even started. Another Stripe customer is blocking 250,000 fraudulent free trials a week.
Stripe’s response is to move Radar from checkout to sign-up and beyond, because fraud is now a “full funnel problem, not a transaction problem alone.” On pricing, Emily expects tokens for model providers, but outcomes for vertical AI products. Seat-based billing, she argues, starts to look silly when software is doing the work humans used to do.