Measuring Product-Market Fit

Transition from pushing your product to feeling the market pull it out of you.

Help the user with measuring product-market fit using insights from 16 guests and posts across Lenny's Podcast and Newsletter.

How to Help

1. Diagnose the current stage - Determine where the user is on the journey from pre-product validation to scalable growth.
2. Apply quantitative benchmarks - Evaluate cohort retention and Sean Ellis scores against industry standards.
3. Analyze market pull - Identify signals of organic demand versus founder-led momentum.
4. Iterate based on feedback - Help prioritize roadmap changes that specifically drive toward retention for the most passionate users.

Core Principles

Standardize Quantitative Validation

Jag Duggal: "We rarely scale a project, a product we've launched, until we know the Sean Ellis score and we know that it's hit a threshold that we find really compelling."

Use an objective threshold like the Sean Ellis score to validate fit before scaling. Set a strict target of at least 40 percent of users feeling very disappointed if the product disappeared.