← Back to Greenlight
Hindsight Intelligence / Free analysis / Real founder stories

See it coming. Before you build.

Learn from failures before you make them. First, a free analysis that imagines your idea two years from now, failed, and works backwards to what killed it. Then, when our record holds founders who tried something close to your idea, we show you what actually happened to them.

Get Started
Lens one · The premortem

A technique going viral in founder circles. Run for you by trained AI agents.

The premortem: assume your idea is two years old and it failed. Work backwards - what killed it? Reasoning from failure backwards surfaces the risks optimism hides: the distribution gap you assumed away, the customer acquisition cost you never modeled, the dependency you called "solvable."

It is a hard exercise to run on your own idea, because optimism gets in the way. So you don't run it alone: our trained AI agents run the premortem analysis for you, grounded in research on how startups actually fail. You describe your idea. The agents bring back your sharpest projected failure modes.
Run premortem analysis
The premortem is free. No payment, no commitment.
Two lenses, one blind spot

What could kill your idea.
What actually killed others'.

The premortem projects what could kill your idea. The postmortem comes from something real: our growing database of founder stories, collected from the many places founders write about their journey - what they built, how it went, and why it succeeded or failed. When your idea is close to ideas in that record, we show you what actually happened to the founders who tried. Where projection and record agree, pay attention.

Free · always available
The Premortem
Our trained AI agents assume your idea failed two years from now and work backwards. What killed it? Your sharpest projected failure modes, surfaced before you build.
Paid · only on a genuine match
The Postmortem
What actually happened to founders who tried something like your idea, and why. Shown only when our record holds founders whose ideas were genuinely close to yours. If it doesn't, we tell you plainly and show you the premortem alone - we never dress up loosely related stories as precedent.
Confirmed Risk Area
Where both lenses point to the same risk: your highest-confidence blind spot, corroborated from two directions. Confirmed by forward analysis and backward evidence - not theory.
The honest limit

Hindsight does not tell you whether your idea will work. Only the market does that.

Now run the real experiment. The 7-day sprint puts your idea in front of actual strangers in today's market and brings back an honest answer.

Run Market Validation