WhittleOS

Most idea tools are built to encourage you. WhittleOS is built to say no. Give it a market and it goes and looks. On the published example run it split the market into 20 sub-markets, ran 60 searches, read 24 pages in full, and pulled 56 documented problems from 41 sources — 32 of them carrying a link you can open, the rest labelled as the tool's own estimate instead of being dressed up as evidence. 69 candidate ideas went in. 36 were dropped against a fixed list of deal-breaker checks: no documented problem behind it, no repeatable way to reach buyers, can't charge enough to be worth one person's time, too much hands-on support, leans too hard on a single platform. 5 came out, each with a verdict, the evidence behind it, and a plan to test demand without a single call. The best idea in that run scored 52 out of 100 and the verdict was "test it first". The whole run is published unedited at whittleos.com/sample-discovery — every rejection included, with the reason for each. For solo founders who would rather lose an idea in an afternoon than lose six months to it.