Net revenue retention has become the default lens for pricing durability across software diligence generally, and for horizontal SaaS it earns that position. Applied unmodified to vertical market software, it frequently sends the wrong signal, and the businesses with the widest moats in this category often carry the most mediocre-looking NRR on a slide.
NRR blends expansion, contraction, and churn into a single number built around the assumption that customers naturally grow their usage over time, the way a horizontal SaaS product scales with a growing customer's headcount or transaction volume. That assumption does not hold the same way in a lot of vertical markets, and the metric should be unbundled rather than trusted as a single composite score.
Why expansion looks structurally different in a vertical market
A horizontal SaaS product often expands within an account as the customer's business grows: more seats, more usage, more modules adopted as needs evolve. A vertical market software product sold to, say, a regional credit union or a dental practice group often has a much more fixed footprint once implemented, because the customer's own headcount and operations are not scaling the way a venture-backed startup customer's would. Flat expansion in this context is not a sign of weak product-market fit. It is often just an accurate reflection of a stable customer's stable needs.
Logo retention deserves more weight than the blended number gives it
Because switching costs in true vertical markets tend to be operational rather than purely contractual, logo retention, the simple percentage of customers who stay year over year, is often a cleaner signal of durability than a blended NRR figure that can mask high logo churn with strong expansion from the customers who remain. A business retaining 96 percent of logos with flat expansion is telling a very different, and often better, story than a business retaining 85 percent of logos with strong expansion masking the churn.
Price realization is the metric most diligence processes skip entirely
In markets where usage-based expansion is structurally limited, price increases on the existing base are often the primary lever for revenue growth per customer. Tracking realized price increases over time, separately from any usage-based expansion, shows whether the business actually has pricing power in its vertical, which is frequently a better predictor of long-term margin durability than NRR captures on its own.
What this means for how to underwrite these deals
Ask for logo retention, price realization, and usage-based expansion as three separate line items before accepting a blended NRR figure at face value. A vertical market software business with unremarkable blended NRR and excellent logo retention plus real pricing power is frequently the stronger underwrite, even though it would screen worse than a flashier competitor on the single metric most diligence templates default to.