ChatGPT will agree with you. FounderKit makes you prove it.
We built FounderKit because the most dangerous thing an early founder can have is a confident answer nobody checked.
Why this exists
Roughly 35% of startups fail because there was no market need — not because the product was bad, but because nobody validated the demand before building it (CB Insights). That failure is almost never caused by a lack of ideas or effort. It is caused by months of work resting on an assumption that was never tested.
AI has made that easier to get wrong, not harder. A general assistant will write you a market size, name three competitors and produce a confident pitch deck in ninety seconds. It will do this whether or not any of it is true, because being agreeable is what it is for.
FounderKit is built on the opposite instinct. Every output is tied back to something you can point at: an interview you ran, a page we actually read, a person who actually signed up. When the evidence is not there, it says so.
Why not just use a general AI assistant?
It is the fair question, and for some tasks the honest answer is that you should. If you want a paragraph rewritten, use the assistant. Here is where the difference actually bites.
| A general AI assistant | FounderKit | |
|---|---|---|
| Memory | Forgets between chats. You re-explain your idea every session. | Holds your venture, interviews and evidence. Arguments build on last week. |
| Market research | Recalls competitors from training data. Some no longer exist. | Runs live web search and reads competitor pages. Every claim has a source. |
| Disagreement | Agrees with your framing, because it is built to be helpful. | Pushes back on a weak segment or an unproven claim. That is the product. |
| Output | Text you paste somewhere else. | A hosted waitlist page collecting real emails, and a deck built from evidence. |
| Structure | A generic ten-slide deck, the same one for everyone. | Sequoia, Y Combinator or Hub71 frameworks, gated by fundraising stage. |
Who it is for
Founders at the beginning — before the traction, usually before the team, often before the company exists on paper. In 2026 that is most of them: solo founders are 63% of new startups (Stripe), and Stripe Atlas incorporations grew 130% year on year in Q1.
More people are starting than ever, with less support around them than ever. A solo founder has no cofounder to argue with, no partner to say the segment is too broad, nobody to ask whether anyone actually wants this. That is the gap.
What we believe
An honest gap beats a confident fabrication.
If you have no traction, the deck says pre-traction. Investors check, and a single invented number costs you the room.
Evidence should be harder to ignore than opinion.
Your confidence score goes down when interviews get stale. The tool is meant to be slightly uncomfortable.
Cancelling should take one click.
It opens Stripe's own portal. No retention call, no email required, full refund within 14 days of a first payment.
You own what you make here.
Your ideas, evidence and decks are yours. Export signups as CSV and progress as PDF whenever you want.
Start with the idea you have
Free forever for one venture — the mentor, the evidence vault and a hosted waitlist page that collects real signups. No card.
Start free