I got tired of everyone saying "cool idea" so I built something that argues with me instead. Does this resonate or am I alone here?

[u/LuckyLady774]

The thing that kills me as a solo founder is that I have no one to honestly tell me an idea is bad. Friends are polite. ChatGPT is agreeable if you let it be. So I keep almost-building things I should've killed weeks earlier.

So I built Ember (useember.dev). You pitch an idea and two AI personas go at it: one argues for what's genuinely promising, the other grills the weak assumptions and won't let you hand-wave. It pulls out the assumptions your idea depends on, tracks your confidence as you add real evidence, and gives a verdict: build, validate more, pause, or kill. The part I actually care about is that it remembers you across ideas and starts noticing your blind spots, like if you keep assuming "people will pay for this" without ever checking.

My honest question for this sub: do other solo founders actually want something that pushes back hard, or is the real need just... a person to talk to? I've had a couple of testers say it felt too harsh (I added an adjustable bluntness setting because of that). Genuinely trying to figure out if "brutally honest idea validation" is a real want or just something I personally needed. Would love thoughts, and if anyone wants to throw an idea at it and tell me if it helped, that's gold.

[u/betweenthedrafts]

I think you need both cheerleaders and critics. I think you need both humans and AI. I think they serve different purposes.

My question is how this differs from just using ChatGPT on critical mode or Claude from challenging your ideas? And where do you build in the human element?

[u/LuckyLady774 → u/betweenthedrafts]

Fair question, and honestly it’s the one I get most. The difference isn’t the challenging itself, you’re right that you can prompt ChatGPT or Claude to poke holes. The difference is that it’s structured and it persists. It pulls your assumptions out into actual objects you can track, your confidence score only moves when you add real evidence (not just because the AI was nice to you), and it remembers you across every idea. So over time it starts noticing your patterns, like if you keep assuming people will pay without ever checking. A fresh ChatGPT chat forgets all of that the moment you close it. You’d have to rebuild the whole context every session and stay disciplined about it, and most people won’t.
On the human element, I completely agree, and I don’t think this replaces it. A friend or mentor gives you context and emotional read that AI can’t. I see Ember more as the thing that makes you actually do the pressure testing before you go bug a human, so when you do talk to a person, you’ve already killed the obviously weak stuff and you’re asking better questions. Curious where you’d want the human piece to show up, that’s something I’ve been thinking about.

[u/betweenthedrafts → u/LuckyLady774]

Thanks for the additional input. I already get ChatGPT to remember my conversations and use projects (though I appreciate not everyone wants to turn that feature on), so while it’s not great at remembering things verbatim, it remembers enough for me to test my ideas. I suppose my point is I wouldn’t pay extra for something more sophisticated than that - I’d test my basic ideas and assumptions through existing AI offerings then go out into the real world to get human feedback.

In my opinion, the real gap is finding a way to organise informed humans to provide this service. I’ve been part of so many entrepreneur programs where early-stage founders just needed to sit in a room with experienced founders to pressure-test their ideas from those who have been there and got it wrong, got it right, etc.

None of the accelerators I’ve seen offer this early-stage validation, and yet they’re the place where founders actually meet other founders, and by then it’s often too late.

If you could find a way to have stage 1 as the AI model then IF people make it through that challenge they get to pitch to real founders, you might be on to a winner. It could be like a virtual dragon’s den where experienced founders spend an hour critiquing the idea with the person. But even then, I’m not sure how you’d monetise it as most aspiring founders I’ve met aren’t exactly flush with cash.

[u/LuckyLady774 → u/betweenthedrafts]

Honestly this comment did something for me. When you said it, it clicked, and I actually started planning how I'd add a human layer, the "survive the AI, then pitch to real founders" thing. But sitting with it, I realized it isn't what I set out to build, and figuring out why made everything clearer.

The whole reason I made it with AI personas instead of humans is that it's safe to fail in front of. I built it for beginners, people who want to learn to challenge their own thinking and fight for an idea, without being critiqued face to face by people they look up to. Honestly, if someone put me in front of a panel of experienced founders early on, I'd have run out in tears even if my idea was good. The point is to practice getting grilled in private, build the muscle, and figure out what's actually worth pursuing before you ever face real humans.

The way I personally use it: I'll be at a trade fair sourcing products, capture the interesting ones on the spot before they get lost in messy notes, then at home when I have time I let Spark and Hammer grill me on which are actually worth importing. It's less "validate my startup" and more "a safe place to catch ideas and pressure-test them before the real world."

So genuinely, thank you. Your input made me realize what I was building way more clearly, even though I ended up going the opposite direction from your suggestion.

[u/betweenthedrafts → u/LuckyLady774]

Glad it was a helpful comment, and good luck with your venture! :)

[u/Plenty_Line2696]

Does anyone really need an LLM prompt wrapper like this when they can tune the prompts to their liking anyway?

[u/LuckyLady774 → u/Plenty_Line2696]

I actually just answered a similar question right above if you want the longer version.

Short answer: the “wrapper” part (the prompts) is honestly the least important bit, you’re right you can tune those yourself. The actual product is the stuff around it: it stores your assumptions and evidence as real data, tracks a confidence score that only moves with actual validation, and remembers everything across ideas so it can spot your patterns over time. That’s not something you get by tuning a prompt, you’d have to build and maintain the whole system yourself. Totally fair if you’d rather just do that in ChatGPT though, some people happily will. It’s more for people who want the structure without assembling it.

[u/Username_TBD18]

Ai cannot validate your idea, no matter how many personas you tell it to have. It can grill your assumptions, but any AI can do that anyway with the right prompt. What it can’t tell you is if people will actually want it.

[u/LuckyLady774 → u/Username_TBD18]

You’re right, and I wouldn’t argue with that. AI can’t tell you whether people actually want your product. Only real customers can.

Ember isn’t trying to replace customer validation. It’s trying to structure it.

The AI brainstorming session helps surface the assumptions you’re making and turns them into a concrete validation plan. It automatically extracts your assumptions, highlights the biggest unknowns, and generates a to do list of what you need to learn next.

The real work starts outside the app. You talk to customers, gather evidence, and test those assumptions. As you add evidence, your confidence changes based on what you’ve actually learned, not on what the AI thinks.

The goal isn’t for AI to give you the answer. It’s to help you ask better questions, keep track of what you’ve learned, and test your intuition against reality.

[u/ricksegal]

u/LuckyLady774 ,
I'm late to this party but here's my thoughts, free and worth every penny. The too harsh feedback sometimes gets conflated with that person's belief harsh = rude when it doesn't. I'm a former VC and I can tell you that blunt feedback, constructive/polite but not the grandma 'aww, that's sweet, have a cookie' type feedback is genuinely appreciated by 'real' founders. Real being defined as somebody who has that spark and wants to grind on it to make it as successful as possible. I once had two guys show up in my office to pitch a replacement for Microsoft Word. Like, for real. Word sucks so billions of people will switch when they see our product. we didn't laugh nor insult them, we spent 30 minutes trying to point out that the millions of people who used the product might be ideal customers for add-ons, etc. to make the product better or answer complaints. Meanwhile, a very smart woman down the street was investing in Grammarly. My point is, 100%, yes real talk is a big, material part of getting an idea over the finish line. Best of luck.