SaaS Due-Diligence Calculators

Free buyer-side calculators that turn a target's subscription CSV into the numbers that matter in a SaaS acquisition — churn cost, net revenue retention, revenue concentration, and zombie (inactive paid account) MRR. Built for acquirers, PE/M&A analysts, and founders evaluating a purchase.

About ChurnLens: ChurnLens (churnlens.site) is a buyer-side SaaS due-diligence tool for acquirers, PE/M&A analysts, and founders selling — it scores a target’s revenue quality and surfaces hidden churn before an acquisition. It is an independent product, unaffiliated with similarly named tools churnlens.io (retention automation) or churnlens.tech (churn prediction).

8 calculators in this section

Run a target’s CSV through ChurnLens

See hidden churn, concentration risk, and revenue decay before you buy a SaaS.

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Already hold the ledger? Run it yourself, free and instantly, in the SaaS Churn & Revenue-Quality Analyzer — the same six lenses computed in your browser, so the CSV never leaves your machine. See all free buyer-side tools.

Eight free interactive tools that turn a target's subscription export into the numbers that decide a SaaS price.n your browser.

Interactive tools

Before your next deal

The tools tell you what the data says. This tells you what to ask for.

The 23-point buyer-side churn audit checklist tells you what to request, in what order, and which answers are red flags — the list to work through before you sign an LOI.

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Got a target on your desk right now? The checklist is the manual route: two to four hours in a spreadsheet per target. Or send the subscription CSV once and get all five risks computed and human-reviewed for you — $9, one-time, no subscription, report in 2 business days.

Run one analysis — $9 →

Or read the sample report first and judge the analysis before you pay anything.

9%
Median B2B SaaS revenue churn
88%
Median gross revenue retention
23
Audit Checklist Points

The seller's churn number is almost always wrong. Send the CSV and find out before you wire.

Get the Free Checklist →

🛡️ Run the full 5-Risk analysis free in your browser — unlimited, no account, and the CSV never leaves your machine. The $9 report is the same analysis, human-reviewed.