Sign in to track usage
Sign inStress-test ideas. Find stronger paths.
Break weak ideas.Build stronger ones.
Devil's Advocate stress-tests your idea, exposes weak assumptions, and shows where the stronger solution paths are.
Startup ideasBrand conceptsProduct strategyMarketing anglesDesign critiques
2,847 ideas stress-tested this month
"Saved me 6 months of building the wrong thing. The critique found a fatal flaw I was blind to."
Marco R.
Founder, SaaS Startup
"Better than any advisor I've paid. Brutally honest but always constructive."
Sarah K.
Product Manager
"Used it to validate 3 ideas. One survived. That one is now doing $20k MRR."
James L.
Serial Entrepreneur
Sign in to track usage
Try an example
Conversation
Structured critique + solutionsThis AI attacks weak thinking, then shows better options.
Paste an idea on the left and it will:
- identify the real core idea
- expose weak assumptions
- show what could fail in the real world
- propose stronger solution paths
Paste an idea on the left and it will:
- identify the real core idea
- expose weak assumptions
- show what could fail in the real world
- propose stronger solution paths
Pricing
Choose the right level of pressure.
Start free, validate the value, then unlock stronger rewrites, deeper solution paths, and more idea reviews.
Free
$0
- 3 idea reviews
- Structured critique
- Premium execution advice locks on final free review
Best for trying the product
Pro
$12/mo
- Unlimited reviews
- Full solution paths
- Better rewrites and stronger execution advice
- Best for founders, consultants, creators
Credits Pack
$7
- 25 extra reviews
- Good for occasional use
- Paid credits unlock premium sections while available
Frequently Asked Questions
How does Devil's Advocate work?
You paste your idea, select a critique mode and category, and our AI analyzes it from multiple angles - identifying weaknesses, hidden assumptions, and suggesting stronger paths forward.
Is my idea safe? Will you share it?
Your ideas are completely private. We never share, sell, or use your submissions to train AI models. Data is encrypted and you can delete your history anytime.
What's the difference between modes?
Soft mode is diplomatic and constructive. Balanced is direct but fair. Hard mode is brutally analytical - no sugar coating, maximum honesty.
Can I use it for any type of idea?
Yes! Startup pitches, product concepts, marketing strategies, business models, creative projects - any idea you want to stress-test before investing time and money.
What happens when I run out of credits?
Free users get 3 reviews. Pro users get unlimited reviews. You can also buy credit packs for occasional use without a subscription.