Show HN: I accidentally built a startup idea validation tool
14 kptbarbarossa 42 8/12/2025, 8:29:23 PM validationly.com ↗
I was working on validating some of my own project ideas.
While trying to find how to validate my idea, I realized the process itself could be turned into a tool.
A few late nights later, I had something that takes any startup idea, fetches discussions, summarizes sentiment, and gives a quick “validation score.”
It’s very rough, but it works, and it’s already making me rethink a few of my own ideas.
It's still a work in progress. I don't actually know what I'm doing, but I know it's worth it. Honest feedback welcomed! Live demo here: https://validationly.com/
Here's the Reddit copy it provided:
AI-Powered Startup Idea Validation: Is Your Idea Viable?
This AI tool helps validate startup ideas by analyzing market trends, competition, and potential revenue. Share your ideas!
Like the idea though.
> 65, "good potenial"
> Model:Freemium SaaS
> Price:$29/month
> Break-even:18 months
> LTV/CAC:4.2x
> Projected MRR:$25K by Year 1
You might want to add a section where you list related/similar startups and how well they are doing (in terms of ARR and/or other metrics.)
> Breathe in the crisp mountain air, anywhere > Introducing bottled mountain air. > #fresh #nature #wellness
OP, here are some pointers: prompt the model into the most negative, raunchy and insurmountable as possible personality. Give it examples in the system prompt on how VCs (or your average reddit user...) responds to business ideas, maybe as a different persona, then present negatives and positives from the model at different angles. Wash, rinse, iterate.
30/100
35/100
My start up is going to crush yours.
U gonna B rich!