TL;DR
- GRR measures how much recurring revenue you keep after churn and downgrades. It excludes expansion and cannot exceed 100%. It tells you how well you keep the revenue you already have.
- NRR includes expansion from upsells, cross-sells, and usage growth. It can exceed 100%. It tells you whether your existing customer base is growing or shrinking in aggregate.
- The danger: High NRR can mask low GRR. A company with 110% NRR and 78% GRR is losing one in five dollars from its base and covering the loss with aggressive upsells. This is not sustainable.
- Benchmarks (2026): Median B2B SaaS GRR is 88-92%. Median NRR is 101-106%. Top-quartile companies sustain GRR above 90% and NRR above 110%.
- Investor sequence: They check GRR first to underwrite revenue durability. Then they check NRR to assess expansion potential. Both matter, but GRR is the foundation.
Gross revenue retention and net revenue retention are the two most important metrics for understanding whether your SaaS business is built to last. One measures how well you keep what you have. The other measures whether your customers grow with you. Most operators can quote their NRR. Fewer can quote their GRR. That gap is where problems hide.
A company with 115% net revenue retention looks healthy on the surface. If its gross revenue retention is 80%, it is losing 20% of its base revenue every year and masking the leak with expansion. Expansion is not infinite. Eventually, the customers who can upgrade have upgraded. The churn remains. This post explains the exact difference between these two metrics, how to calculate each, what good looks like by segment and stage in 2026, and when to use each metric to diagnose your business.