Notes on billing & revenue

Three pricing models are competing to define how AI products charge for value: per-token, per-agent, and per-outcome. Here's how real companies use each one, where each one breaks, and what it takes to bill this way without guessing.

Stripe Billing is the default choice for a reason. Here's what actually breaks as usage pricing gets more complex, what a migration really carries over, and how to tell if you've hit the point where switching is worth it.

Failed payments silently erode revenue and drive involuntary churn in usage-based SaaS. Kribana's autonomous agent diagnoses declines and acts fast, targeting recovery where it's actually likely to work.

At a few thousand events a second, naive aggregation falls over. Here's the ledger design that doesn't.

Prepaid credits look simple until burn-down, grants, and top-ups collide. A field guide to getting it right.

Tier boundaries matter less than most teams assume. Overage framing matters more.

Blind retry schedules recover less money and burn more goodwill than a diagnosis-first approach.

A monthly invoice run that ate three engineer-days became a number nobody thinks about anymore.