GRR and NRR stand for Gross Revenue Retention and Net Revenue Retention respectively. These metrics help assess the health of a company's recurring revenue especially in the case of subscription-based business models:
Gross Revenue Retention (GRR):
GRR measures the total revenue retained from existing customers over a specific period, typically a year, without accounting for any new sales or expansion revenue
Net Revenue Retention (NRR):
NRR goes a step further by including the impact of expansion revenue from existing customers (e.g., upgrades and upsells) in addition to the revenue retained from existing customers