An AI cofounder for the lean startup
Your plan is a stack of guesses.
Lex breaks it into testable hypotheses, ranks them by what kills the business fastest, finds and emails real people who match your riskiest one, and coaches the conversation so you learn the truth — not politeness.
Paste your plan
Even messy notes work. Lex pulls out the leap-of-faith assumptions hiding inside it, ranks them by what kills the business fastest, and gives each one the cheapest test that could settle it this week.
Find people worth testing it on
Lex finds real people who match your riskiest assumption, reads their site for a genuine reason to reach out, and drafts the email. You approve every single send before it goes anywhere.
Walk into interviews ready
A question sheet built from The Mom Test, tailored to whoever's in the room and tied to your riskiest hypotheses — plus the mistakes you're most likely to make, like pitching before you've learned anything.
Debrief like a cofounder was listening
Paste or upload the transcript. Lex separates real evidence from politeness, updates your hypothesis board, flags where you led the witness, and tells you what to probe next time.
Why hypotheses?
Most startups don't die from building badly. They die from building the wrong thing carefully. Every plan quietly assumes things — that the pain is real, that people would switch, that they'd pay, that you can reach them. Lex drags those assumptions into the open and makes each one something you can test this week, before you spend a month building on top of it.