NRR (Net Revenue Retention)
Revenue from existing customers this period vs. last, including expansion and churn.
NRR measures what happens to a cohort of existing customers' revenue over time. 100% means revenue held steady; above 100% means expansion exceeded churn (negative churn); below 100% means churn won. Best-in-class SaaS run 120%+ NRR. Standard benchmark SaaS metric for investors.
Formula
NRR = (Starting MRR + Expansion - Contraction - Churn) / Starting MRR x 100