Growth Is a Story. NRR Is Evidence.
Every founder I meet leads with growth. "We doubled last year." "We're up 60% and accelerating." It's a good story, and often a true one. But somewhere in the second week of diligence, the conversation always turns to a quieter number — one most bootstrapped founders have never been asked about in their lives. Net revenue retention. And when it turns, the story stops mattering and the evidence takes over.
Here's why NRR has become the number buyers reach for first. Growth tells you how good your sales team is at landing new logos. NRR tells you what happens to a customer after they sign — whether they expand, renew, and lean in, or quietly shrink and leave. A buyer is not purchasing last year's growth. They're purchasing next year's, and the year after that. NRR is the closest thing on the page to a promise about the future. Think of new-logo growth as filling a bucket; NRR tells you how big the holes in the bucket are. You can pour faster all you want — if the bottom leaks, you're funding a treadmill.
The market prices this gap with brutal clarity. In Software Equity Group's public SaaS index, companies below 100% net retention trade around 3.1x revenue — a 46% discount to the median. Companies above 120% trade near 9.3x, a 63% premium. Same software category. Same growth headlines. Triple the multiple, decided largely by one retention metric. Snowflake, at the top of that index, has historically carried NRR well above 120% and a multiple to match. That spread doesn't exist because buyers love a vanity stat. It exists because retention is the hardest number to fake and the most expensive one to fix after close.
For private, bootstrapped companies the benchmarks are more grounded, but the logic is identical. SaaS Capital's 2025 survey puts median NRR for private B2B software between roughly 102% and 110% depending on contract size, with top-quartile operators pushing past 115–119%. If you're sitting at 98%, you are not "growing but a little leaky." You are, in a buyer's model, a company that shrinks without constant new-sales spend — and that reframes your entire valuation before you've said a word.
This is where a good advisor earns their keep, and where bootstrapped founders most often go in blind. Founders who've never run a process don't know NRR is coming, don't know how a buyer will calculate it (often differently than they do), and haven't spent the twelve to eighteen months before going to market quietly moving the number. The advisory work isn't the deal — it's what happens well before the deal, turning a defensible story into defensible evidence.
So here's the exercise worth doing this quarter, whether or not you're thinking about selling: pull last year's cohort and calculate what that group of customers is worth today versus twelve months ago, expansion minus churn and contraction. That single figure is what a buyer will underwrite. If you don't know it, you're negotiating your life's work on a number a stranger will calculate for you. The founders who win the room are the ones who bring the evidence before they're asked for it.