Money, Pricing & Model

What is churn and how much churn is too much?

A starting point

Churn is the rate customers leave, and it silently caps your growth because you're refilling a leaky bucket. For SMB SaaS, ~3-5% monthly is common but painful; for B2B you want low single digits annually. If your product has high churn, fixing retention beats pouring money into acquisition every single time.

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16 Startup Metrics

From a16z by Andreessen Horowitz (a16z) ~15 min read

Why we picked it

The reference primer on the metrics and market-sizing logic investors use, including bottom-up market sizing that keeps founders honest about how big a market really is. Canonical a16z source.

  • Size markets bottom-up from customer count and willingness to pay
  • Know the metrics that actually signal a healthy business
  • Distinguish real traction from vanity metrics
  • Use consistent definitions when comparing yourself to the market
Open a16z.com →
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The SaaS Metrics That Matter

From sacks.substack.com by David Sacks essay

Why we picked it

David Sacks (PayPal, Yammer, Craft Ventures) distills the metrics that actually predict a SaaS company's health, including the burn multiple he popularized. Sharp, operator-grade, and opinionated.

  • Net revenue retention and the burn multiple reveal true capital efficiency
  • Focus on a small set of metrics reviewed on a strict weekly cadence
  • Growth and profitability must be balanced (the Rule of 40)
Open sacks.substack.com →

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