How to Avoid the Sunk Cost Fallacy by Validating Early

Sunk cost is the silent startup killer. You invest time and money, so you can't let go, even when demand is absent. DemandSonar introduces an early “Kill Switch.” If you validate with our platform before heavy investment, the AI’s objective score gives you permission to walk away with minimal guilt. A founder spent $200 and 4 hours validating an idea that scored 36. He killed it on day one, felt a brief sting, and then validated a second idea that scored 81. He built that instead, and it's now his full-time income. The kill switch saved him $20,000 and a year of his life. [Validate early, avoid sunk cost →]