definition

A lean startup is a business approach where founders focus on building products or services quickly, testing them with real customers, and adjusting based on feedback, rather than spending years developing something that might not fit the market.

The goal is to reduce waste, speed up learning, and improve the chances of building a sustainable company.

The term gained popularity through The Lean Startup, a 2011 book by entrepreneur Eric Ries. Ries outlined a framework where startups use the “build–measure–learn” cycle: create a minimum viable product (MVP), gather data on how users respond, and refine the product accordingly. 

This method has been especially influential in tech, where speed and adaptability can determine success or failure.

A lean startup is not the same as a bootstrapped business. Bootstrapping means growing a company primarily with personal savings or revenue, without external investors.

While many lean startups begin this way, some raise outside capital but still apply lean principles to reduce risk and experiment efficiently. In contrast, communities that prefer indie hacking often intentionally avoid outside funding, preferring independence and slower, organic growth.

A well-known example of lean startup methodology is Dropbox. The company initially tested customer interest with a simple explainer video instead of a fully built product. The overwhelming positive response validated demand before significant resources were invested.

Instead of betting big on untested ideas, lean startups emphasize experimentation, customer validation, and adaptability. These are principles that help reduce failure rates and guide smarter investment decisions.