Product-market fit is the most overused phrase in startup culture and the least well-explained. This guide replaces vague definitions with specific, measurable indicators.

1. Define the problem you're solving with uncomfortable precision

2. Run the Sean Ellis survey to get your baseline PMF score

3. Analyze retention curves to see if your PMF is real or borrowed

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StartupsWhat Isguide

Updated 2026-03-28

What is Product-Market Fit and How Do You Know When You Have It

A practical framework for recognizing product-market fit through user behavior signals, retention patterns, and organic growth indicators rather than wishful thinking.

1. Track the 40% rule for must-have products

2. Analyze retention curves for flattening

3. Monitor organic acquisition channels

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StartupsWhat Isguide

Updated 2026-03-28

What is a Business Model and How to Choose One for Your Startup

A practical introduction to business model thinking that helps founders understand the economics of their venture and select models aligned with their specific context.

1. Define your value proposition clearly

2. Understand your unit economics at the granular level

3. Match your model to your customer's payment preferences

5 stepsOpen page

StartupsWhat Isguide

Updated 2026-03-28

What Is Product-Market Fit and How to Measure It

A practical explanation of product-market fit that focuses on measurable signals, diagnostic questions, and corrective actions for pre-PMF startups.

1. Apply the Sean Ellis survey to your active users

2. Examine your retention curve shape, not just totals

3. Track organic pull signals weekly

5 stepsOpen page