growth-engine

A growth engine is the core mechanism driving sustainable user expansion, classified into sticky, viral, or paid types. You can identify your engine by evaluating retention, virality, and CAC/LTV metrics to determine your primary growth driver.

To optimize startup growth metrics during a scaling bottleneck, quantify your current engine's performance against target benchmarks for retention, CAC/LTV, and funnel conversion. This diagnostic process highlights friction points and generates a guided optimization plan.

You need to evaluate CAC and LTV metrics when deciding if a paid growth engine is viable for your early-stage startup. Calculating these ratio targets helps determine if your acquisition costs support sustainable expansion and long-term profitability.

Yes, you can apply this framework to classify growth engines for both B2B tools and consumer apps. The engine identification process adapts metric targets like retention and viral coefficients to suit various application scenarios.

The best way to choose between sticky, viral, and paid growth engines is by analyzing your existing product data. Comparing your retention curves, viral coefficients, and CAC/LTV ratios reveals which engine naturally aligns with your user behavior.

A viral growth engine fails to sustain user acquisition when your viral coefficient drops below 1. This indicates existing users are no longer generating sufficient referrals, signaling a need to optimize referral loops or pivot to sticky retention strategies.