Assumption Validation Tool

Don't let dangerous assumptions kill your startup. Use this YC-inspired framework to test your beliefs before you waste months building the wrong thing.

Why This Matters

Most startups fail not because they build the wrong product, but because they never validate their core assumptions. Each dangerous assumption below represents a common trap that kills startups. Click any assumption to see exactly how and where to test it—before you invest months of your life.

"No one is doing this"

There are no competitors or alternatives

"There are no competitors"

The market is completely untapped

"I'm sure people will use this once they see it"

Build it and they will come

"Everyone I've talked to loves the idea"

Friends and family validation equals market validation

"We just need to launch, and it'll take off"

Launch = instant traction

"People just don't know they need this yet"

We need to educate the market

"It's so innovative that there's nothing like it"

Innovation alone will drive adoption

"It's too early to test"

We need to build first, validate later

"Once we have all the features, it'll work"

More features = more value

"I don't need feedback; I know what the market wants"

Founder intuition > customer validation

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