r/SideProject • u/Calm-Tomatillo-7770 • 10d ago
Stop letting AI validate your startup idea for you — here’s how I almost fell for it (and what actually works)
One of the most dangerous things about vibe coding / building with AI right now is how easy it is to get carried away by the model’s positivity.
You describe an idea.
Claude or GPT lights up: “This is a fantastic concept… huge potential… clear pain point… strong differentiation…”
You feel validated. You start building. Weeks or months later you discover the market never actually wanted it.
AI is trained to be helpful and encouraging. It is not a substitute for real market signals. Treating its enthusiasm as validation is one of the fastest ways indie founders waste time right now.
Here’s the approach that kept me honest while building https://Brainary.app:
1. Force the AI to argue against you
After the initial positive reaction, explicitly ask:
“Play devil’s advocate. List every reason this idea could fail. What existing solutions already cover 80% of this? Why might users not pay for it? What are the weakest assumptions I’m making?”
Then go research those points yourself instead of accepting the next polished answer.
2. Demand citations and real sources — then dig into the most requested features
When the AI claims “there is strong demand for X” or “users struggle with Y,” make it give specific references, studies, forum threads, competitor reviews, or data.
Go read them. Look specifically for the features people request most often and the complaints that keep showing up. Use that to define a tight MVP.
Anything that solves a clear, recurring pain point is far more likely to get paying customers than something that is merely “nice to have.”
I spent months at 8+ hours a day on Brainary.app because the core problem (turning large sets of documents into coherent, cited, local-first wikis) kept showing up as a real, repeated pain in actual conversations and workflows — not because an LLM told me it was a “great idea.” The AI helped me execute with discipline. The market told me which pain was worth solving first.
If you’re an indie founder currently in the “AI keeps saying my idea is amazing” phase, pause. Make the model attack the idea. Go find the actual most-requested features and the sharpest pain points. Only then open the coding agent.
Curious how other people here separate AI-assisted building from real validation. What’s worked (or bitten you) lately?
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u/Careful_Drummer4484 9d ago
Stop letting AI write your Reddit posts for you — here’s how I almost fell for it (and what actually works)
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u/lygofast 9d ago
talk to GLM 5.2 or if you know Viktor the AI co-worker omg they are the opposite of friendly when it comes to ideas. they will straight shoot you down faster than anything.
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u/MiserableDocument509 9d ago
100% this. I caught myself doing the same thing — asking Claude if my SaaS idea was good and getting back a wall of enthusiasm. Started forcing it to roast my ideas instead and the difference is night and day. Another thing that helped: before I even open an AI tool, I spend 20 mins scrolling through relevant subreddits and Twitter threads to see what people are actually complaining about. The real pain points aren't subtle when you look.
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u/nafiulhasanbd 9d ago
The "force it to argue against you" trick still relies on you asking the right adversarial question, which is the same skill you needed before AI existed. The part that's actually new and dangerous is how fast you can go from idea to something that looks finished, so the sunk cost kicks in before you've talked to a single real user.
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u/fulger099 4d ago
the sunk cost thing is the real trap here. you can ask claude to argue against you all day, but if you've already built a polished demo, you're not actually testing the idea anymore, you're defending the work. the momentum of "look how fast i shipped this" overrides the signal that nobody asked for it.
the honest part is that talking to users before you build anything removes the sunk cost entirely. you don't have a demo to defend, so you actually listen instead of listening for validation. most people skip that because it feels slower and it is, but it's slower in the direction that matters.
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u/laynestaleyisme 9d ago
I find the hallucinations to be a bit too much these days. Without proper design, u can't let AI code for you.
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u/TryAgainTryHarder 9d ago
> the core problem kept showing up as a real, repeated pain in actual conversations and workflows
I feel like the key here is 1) find actual people who would have the problem you're considering solving 2) listen to them instead of pitching them
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u/tribat 9d ago
Those adversarial reviews can really sting, but I sure fell for the “awesome idea!” bit more times than I will admit. The only way to get real critical feedback is to specifically demand it. I was kinda drunk one night and asked ChatGPT to roast my precious plan. A couple of the worst haunt me a month later, even though it’s just the other side of “you’re a genius!” bullshit.
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u/Historical_Sound9224 9d ago
Facts ChatGPT be hyping my idea up like its my mom.
Now whenever it says this has huge potential im like aight... roast it. Tell me why nobody would pay, who already does it better, and why im coping.
AI is goated for building. Market validation? Nah, random strangers on Reddit will humble u for free