Is your app idea worth building?
Vibe Check pressure-tests your app concept with a Socratic AI interview, scans the web for real competitors, and delivers a scored report with a devil's-advocate red-team pass — in under 5 minutes.
3 free checks per month · No credit card · Cancel anytime
Pressure-test an idea in three steps
No forms to fill. Just a conversation — the same questions a good YC partner would ask before writing a check.
Pitch your idea
Drop your concept in a single sentence. The AI coach starts digging — one sharp question per turn, no fluff.
We scan the web
While you answer, Tavily searches for real competitors, similar products, and market signals. No made-up results.
Get your scored report
A full breakdown: viability scores, strengths, risks, tech stack, MVP scope, market size, and a devil's-advocate red-team pass.
Everything in one report
Most tools give you a hype check. Vibe Check gives you a reality check.
5-dimension viability scores
Viability, niche clarity, problem strength, differentiation, and an honest overall score — not inflated to be nice.
Real competitor research
Three targeted search queries surface actual apps in your space. The analysis is grounded in what exists, not hallucinated.
Expanded market insights
Market size estimate, funding signals, failed-predecessor graveyard, build effort bucket, and regulatory flags — all in one pass.
Devil's advocate red-team
A ruthless investor-persona tears apart your idea: silent killers, distribution risk, unit economics — the things founders miss.
Tech stack + MVP roadmap
Tailored technology recommendations and a 4-6 step ordered roadmap of shippable milestones — not generic advice.
Refine & re-score
Not happy with the analysis? Edit the pitch and re-run. History is saved so you can track how your idea evolves.
Pick a plan that fits the idea
Start free. When you're burning through ideas faster than 3 a month, Pro unlocks unlimited checks and better reasoning.
Kick the tires. Pressure-test up to 3 ideas a month.
- 3 vibe checks / month
- Competitor scan
- Scored report + devil's advocate
- Session history in the cloud
Ship without counting. Better models, unlimited vibe checks.
- Unlimited vibe checks
- Advanced AI model (Llama 3.3 70B)
- Everything in Free
- Priority during API outages
Pay once — only the first 100.
- Everything in Pro, forever
- Founding-user badge
- Direct feedback channel
Payments handled by Stripe. Cancel anytime from your billing portal. Lifetime tier limited to the first 100 subscribers.
Common questions
How many interview questions will I get?
Where do the competitor results come from?
Can I re-analyze the same idea after tweaking the pitch?
What is the devil's advocate pass?
Is my idea data stored or used to train models?
What models power Vibe Check?
Stop guessing. Start building the right thing.
Three free vibe checks a month. No credit card. Cancel anytime. The hardest part is having the idea — we'll handle the reality check.