Metrics & Performance
Last updated
Quick Answer
The rate at which customers cancel or fail to renew their subscriptions over a given period, expressed as a percentage of total customers or revenue.
Churn measures how much of your customer base or revenue you lose in a given period. Customer churn (or logo churn) tracks the percentage of customers who cancel, while revenue churn (or gross revenue churn) measures the percentage of recurring revenue lost to cancellations and downgrades — before accounting for expansion revenue from existing customers.
Churn is the single most important metric for SaaS businesses because it determines whether growth is compounding or eroding. High churn means you're constantly refilling a leaky bucket — spending on acquisition just to replace lost customers. Low churn means revenue is sticky and compounds over time.
In Practice
A SaaS company starts the month with 100 customers at $100/month each ($10,000 MRR). Ten customers cancel during the month. Customer churn = 10%. Revenue churn = 10% ($1,000 lost). If 5 remaining customers upgrade, net revenue retention could still be positive.
What good looks like
Why It Matters
Investors scrutinize churn more than almost any other SaaS metric. High churn signals a product-market fit problem and makes the business economically unsustainable — CAC payback never comes if customers leave before you recoup acquisition costs. Benchmark: best-in-class SaaS companies have annual gross churn below 5%.
VC Beast Take
Churn is the metric that separates real businesses from growth theater. We've seen too many companies obsess over new customer acquisition while ignoring the leaky bucket of existing customers leaving. Smart founders instrument churn from day one and treat it as seriously as revenue growth. The companies that achieve venture-scale returns typically crack the code on keeping monthly churn under 2% - anything above 5% monthly churn is usually a sign of fundamental product-market fit issues.
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What startup metrics do VCs care about most?
VCs focus on growth rate, revenue, burn rate, CAC/LTV, churn, and net dollar retention — the specific metrics depend on the stage and business model.
Churn measures how much of your customer base or revenue you lose in a given period. Customer churn (or logo churn) tracks the percentage of customers who cancel, while revenue churn (or gross revenue churn) measures the percentage of recurring revenue lost to cancellations and downgrades — before...
Understanding Churn is critical for founders navigating the fundraising process. It directly impacts deal terms, valuation, and the relationship between founders and investors.
Churn falls under the metrics category in venture capital. This area covers concepts related to the quantitative measures used to evaluate fund and company performance.
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