Market research, founder-market fit, premortem analysis, and what actually happened to more than 10,000 founders before you. A ten-minute check before you build, commit, or spend real money.
Every founder asks a chatbot if their idea is good, and every chatbot finds a reason to say yes. Greenlight tells you what happened: to the market you are walking into, to founders like you, and to ideas like yours that came before.
$29. Ten minutes from idea to read.
Run Reality Check $29Some decisions are too expensive to settle with one opinion. Ask a single model and you get a single answer, delivered with the same confidence whether it is right or wrong.
The Advisory Board convenes four seats, one from each frontier lab: Claude Fable 5, GPT-5.6 Sol, Gemini 3.1 Pro, and Grok 4.6. Ask your question, attach anything they should read, including your Reality Check report, and assign each seat one of twelve roles, from the Contrarian to the Behavioral Psychologist to the Customer Advocate. See all roles
Every seat answers independently, without seeing the others. The answers are stripped of their identities and each seat reviews the others' reasoning blind, so nobody defers to a name. A non-voting Chairman reads everything and delivers one synthesis that tells you where the board agreed and exactly where it split, and why. Not one model's opinion: an objective read across all of them.
$5.99 for the standard four-seat board: one seat from each provider. Want a bigger board? $1.50 per additional seat, up to 8 seats in total.
Each is about to make a costly, partially irreversible move. Each can avoid it with ten minutes of evidence.
Startups don't die because founders skip validation out of ignorance. They die because by the time validation would matter, the founder may no longer want the answer. Somewhere between the first spark and the first working version, curiosity hardens into commitment - and AI just made it happen in a weekend. We call it the Commitment Trap.
Read the full thesis →Six patterns of validation that aren't validation. Each one feels productive in the moment. None of them are the market.
Your startup idea.
Checked in ten minutes.Your hardest question,
argued from every side.
The playbook says build first and find out later. These six beliefs say otherwise, and every one of them shapes how we read your idea.
Every program admits on instinct. Greenlight puts a Reality Check on every applicant: the market, the founder, and the record of ideas like theirs, before the cohort begins. Optionally read through your program's own methodology, kept confidential to you.
Reach out if you're an incubator, accelerator, or VC firm exploring partnership opportunities, or if you just want to say hello. We'd love to hear from you.