LEANSpark is a web based application designed to help entrepreneurs validate their startup ideas using a structured, evidence driven approach. Built on the Lean Canvas framework developed by Ash Maurya, the tool guides users through a series of stress tests and scorecards to determine whether an idea is worth pursuing. The platform markets itself as an AI co founder, providing direction on what to build first, what to skip, and when to pivot, with the stated goal of reaching validation in approximately 90 days rather than 9 months. The application offers a tiered workflow. A free tier provides a full stress test covering seven tests, along with a report and an initial fix for each test. The Starter plan, priced at 25 dollars per month, is intended to help users determine if an idea is worth pursuing within about two weeks. The Pro plan at 50 dollars per month allows users to seek pre orders or letters of intent from potential customers. As of the available data, the platform reports more than 6,100 founders actively using it, over 7,300 ideas in play, nearly 9,000 stress tests completed, and more than 2,100 customer interviews logged, with users operating from over 136 countries and in over 32 languages. Typical users include founders who have an idea but lack clarity on the next steps, or those who find generic AI advice too broad and lacking business specific context. The workflow is designed to give users a clear understanding of where their idea currently stands, what needs to be fixed, and by when. Each step produces a verifiable outcome and defines a clear division of labor between the user and the tool. No credit card is required to start, and the application emphasizes that its scorecard is meant to identify failures, with 58 percent of stress tests failing, as a passing scorecard that never fails would be uninformative.