Usage-based

Revenue scales with what customers consume rather than per seat. Net revenue retention runs higher than seat-based SaaS (120–130%+) because expansion is automatic as usage grows — but gross margins carry cloud/compute pass-through, and customer concentration is a real risk. Time-to-first-value, the consumption ramp, gates revenue.

Usage-based pricing flips the SaaS contract model: customers pay for what they consume, so revenue expands automatically as a customer's workload grows rather than waiting for a renewal negotiation. That structural mechanic is why net revenue retention for healthy usage-based businesses often exceeds 120–130% — expansion is baked into the model, not sold separately.

The Consumption Ramp as the Gate

Because there is no committed seat count, the critical early moment is getting a customer to meaningful consumption. Consumption ramp — the time to first value — determines how quickly a new account starts generating revenue. A slow ramp delays ARR recognition and inflates effective CAC payback. Monitoring expansion and upsell rate in cohorts shows whether accounts are climbing the usage curve or plateauing after an initial trial.

Margin and Concentration Risk

The tradeoff is on gross margin. Unlike pure software, usage-based businesses carry cloud infrastructure or compute costs that move with revenue, compressing margins relative to seat-based SaaS. Managing those pass-through costs — and improving them over time through architectural efficiency — is a recurring operational lever. Customer revenue concentration deserves equal scrutiny: when a handful of large consumers drive a disproportionate share of gross bookings, a single churn event lands hard. Tracking net new ARR on both a gross and net basis keeps that risk visible and prevents a large expansion from masking underlying logo attrition.