TL;DR: Gross revenue retention (GRR) measures the percentage of recurring revenue a company keeps from existing customers over a period, excluding any expansion. Because it ignores upsells, GRR is capped at 100% and shows pure retention: how much revenue stays before any growth from the existing base.
GRR tracks the recurring revenue retained from a fixed set of existing customers over a period, after subtracting churn and contraction but without adding any expansion revenue. It isolates how well a company holds on to the revenue it already has. Because expansion is excluded from the calculation, GRR can never exceed 100%; a GRR of 90% means the company lost a tenth of its existing recurring revenue over the period before any new sales or upsell.
Gross and net revenue retention are complementary. GRR shows pure retention, capped at 100%. Net revenue retention (NRR) adds expansion, so it can exceed 100% when existing customers grow. Read together, they separate two things: how sticky the product is (GRR) and how much the existing base grows in value (the gap between GRR and NRR). A high NRR built on a low GRR can mask heavy churn offset by a few expanding accounts, which is why lenders and investors look at both.
Why is GRR capped at 100%? Because it excludes expansion or upsell revenue. It measures only what is retained, so the best possible outcome is losing nothing.
Which matters more, GRR or NRR? Both. GRR reveals underlying stickiness; NRR captures expansion. Looking at them together gives the clearest read on revenue quality.
Related terms: Net Revenue Retention · Churn Rate · Annual Recurring Revenue · Unit Economics
