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DontBuildThis

DontBuildThis

Roast (+fix) your startup idea in 3mins before wasting 3mths

4.5
•14 reviews•

156 followers

Roast (+fix) your startup idea in 3mins before wasting 3mths

4.5
•14 reviews•

156 followers

Visit website
User research
•
Predictive AI
Don't build the wrong stuff. Paste any idea into dontbuildthis.com & let Roasty the Fox smash it against live trend data, competitor signals & our private vault of wins & flops. You get a brutal score, verdict > pivot tips so you can validate in mins, not months. No signup, free to use.
  • Overview
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  • Reviews14
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Company Info
dontbuildthis.com
DontBuildThis Info
Launched in 2025View 1 launch
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p/dontbuildthis
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Free
Launch tags:
Artificial Intelligence•Side Project•Business Intelligence
Launch Team / Built With
David ArnouxWalid Boulanouar
OpenAI
Supabase
shadcn/ui

What do you think? …

David Arnoux
David Arnoux
Maker
📌

👋 Hey ProductHunt! David here, co-founder of dontbuildthis.com.

Let's play!

📝 Drop a 1-line pitch in this thread... Roasty (a.k.a. me for today) will reply with a mini-verdict to the first 50 ideas. Let’s see whose concept survives the flames!

Launch perk for the PH crew

Every Product Hunter gets 30 days of our advanced tier = just use the in-app code PH-ROAST.

Why we built it??

After years of building and hanging out in builder communities, hackathons and innovation labs (and too many “quiet” product funerals) we realised most ideas die before code ever matters = they die because nobody truly needs them. So we turned our internal validation process into an AI-powered (duh), brutally honest and constructive fox called Roasty. Paste a pitch, Roasty slams it against real market data + our vault of wins & flops, then spits out a brutal score and pivot tips. It has already roasted 10k+ ideas inside our venture studio, saving teams months of wasted work.

Help us break it!
- Test your own idea (no signup).
- Tell us what confused, delighted, or offended you.
- Feature requests? Edge cases? Bring ’em on.

Thanks for checking us out, and happy roasting! 🦊🔥

Report
2mo ago
Jean Bonnenfant
Jean Bonnenfant

@darnocks checked it! Super nice product.

Thought it was going to be a quite gimmicky thing, but it's not, it actually gives me valuable feedback.

Report
2mo ago
Ruben Lozano
Ruben Lozano
Lyssna

Lyssna

I love this idea!@darnocks 

An AI personalised ecommerce platform where, based on your inputs about the trip you will get the whole list of recommendations that you might need to buy for the trip. I found when I was younger that I did trips with a little research and then I found cool things that will make my trip better.

Amazon has a lot of options, but imagine Amazon but for travelling. :D

Report
2mo ago
Job Rietbergen
Job Rietbergen
Alphadoc

Alphadoc

This is what the world needs, better business ideas. Just because you can build it doesn't mean you should. My idea: a SaaS app or extension that teaches you stuff in between waiting on the AI while vibe coding. Something that automatically switches context and goes back to the screen when there's something to review. Ready to be grilled.
Report
2mo ago
David Arnoux
David Arnoux
Maker

@jobrietbergen Your Idea: ☠️ Roasted.

Full link and recovery report here

some tips moving forward:

Instead, solve the actual pain: build a tool that makes AI coding assistants faster or more reliable for devs, or one that intelligently manages context and interruptions for deep work.

Report
2mo ago
Job Rietbergen
Job Rietbergen
Alphadoc

Alphadoc

@darnocks love it. Will further fine tune it.
Report
2mo ago
Jasper Ruijs
Jasper Ruijs
Growth Hackers Guide To Producthunt

Growth Hackers Guide To Producthunt

@darnocks and @walid_boulanouar are among the most intelligent individuals in their respective fields within the AI community.

I hope they can build this towards the heights of Appsumo or Prelaunch.


Report
2mo ago
David Arnoux
David Arnoux
Maker

@walid_boulanouar  @jas801 thank you Jasper! Means a lot coming from you.
Now that's you're here.. any business idea I can roast for you?

Report
2mo ago
Jasper Ruijs
Jasper Ruijs
Growth Hackers Guide To Producthunt

Growth Hackers Guide To Producthunt

@walid_boulanouar  @darnocks I am happy as a freelancer 😁

Report
2mo ago
GoPerfect - Real-Time Hiring
GoPerfect - Real-Time Hiring — Skip the Search. Meet top Candidates fast.
Skip the Search. Meet top Candidates fast.
Promoted

Do you use DontBuildThis?

4.5
Based on 14 reviews
Review DontBuildThis?

DontBuildThis is praised for its ability to provide quick, domain-specific feedback on startup ideas, helping users decide whether to proceed or pivot. Users appreciate its combination of usefulness and playfulness, with many finding the brutally honest feedback both refreshing and accurate. The tool is seen as a valuable resource for fine-tuning business ideas and is recommended for anyone looking to validate their concepts before investing significant time and resources. However, some users express concerns about data retention and limited free usage.

Wes Baileyj GkDaniel Sharon
+11
Summarized with AI
Pros
Cons
Reviews
Helpful
Pros
accurate feedback (3)
business idea validation (3)
fast feedback (2)
objective analysis (2)
Aurelien Arnoux
Aurelien Arnoux
•1 review
Got roasted, but also very helpful. I thought it was going to be a gimmick tool, but the results were actually really helpful, brutal but true, and helpful to fine tune some of my business ideas.
Report
2mo ago
ANAS NASEER
ANAS NASEER
•1 review
It's the best business idea validation tool I have used so far it combines both usefulness and playfulness in one tool. I recommend every body to give it a try before you start vibe coding any SAAS
Report
2mo ago
Ruben Nieuwenhuis
Ruben Nieuwenhuis
•1 review
Great, very helpful thx! Considering using it for the BD team on other ideas.
Report
2mo ago