Most feedback tools validate your idea. Devil's Advocate makes you defend it out loud. Say your pitch and a live voice AI listens, challenges weak assumptions, and forces you to argue back in real time. Speaking activates different thinking than typing, you can't hide behind polish. No cheerleading. Just a pressure test, a scorecard, and a gap analysis showing exactly where you cracked.

AppSignal — Get full visibility into app health, errors, and performance

Get full visibility into app health, errors, and performance

Joey here, one of the builders. The idea came from watching founders, including ourselves, get destroyed in meetings after months of positive feedback from friends and advisors. Nobody was telling them(us) what was actually wrong. Devil's Advocate flips the script. Instead of asking "what do you think?", you have to defend your idea out loud against an AI that's specifically trying to poke holes in it. The voice debate is powered by Gemini Live, so it goes back and forth with you, pushes back in real time, and won't let you dodge a weak answer. At the end you get a claim-by-claim scorecard identifying what you defended, what you conceded, and where your biggest gaps are. We built this for a Google Gemini hackathon and a UIUC research study on whether adversarial AI feedback actually improves ideas vs. standard LLM chat. Early results are interesting. Live demo is free, no signup required to try it: devils-advocate-488918.web.app Happy to answer anything, especially if you have feedback.

AppSignal — Get full visibility into app health, errors, and performance

Get full visibility into app health, errors, and performance

Devil's Advocate

An AI that debates your startup idea back at you

An AI that debates your startup idea back at you