β Glossary
Product-Market Fit (PMF)
The degree to which a product satisfies a strong market demand. When users love your product so much that it grows organically.
Marc Andreessen coined the term, describing it as 'being in a good market with a product that can satisfy that market.' Signs of PMF include: organic growth without marketing spend, users complaining when the product is down, NPS above 40, and retention curves that flatten rather than decline. According to Sean Ellis, you've found PMF when 40%+ of surveyed users say they'd be 'very disappointed' without your product. Most startups die before finding PMF because they run out of money or motivation.