FounderOS turns your business idea into testable assumptions, real-world experiments, and an evidence record that helps you decide what to build next.
Free to start. No card required.
Assumption
Independent designers will pay ₹1,000 per month for this workflow.
Evidence
4 interviews completed. 3 said the problem exists, but 2 currently solve it manually and only 1 expressed willingness to pay.
Customer interviewsMostly negativeModerate strength
Demand confidence
5/104/10 Decreased
Next decision
Test a smaller manual service before building software.
Example workflow — not real customer data.
The founder problem
They fail because time and money go in before anyone knows whether the customer is real, the pain is urgent, or the price will be paid.
“I'd use that” costs nothing to say. Paying, pre-ordering, or switching is the signal that counts.
Months go into a product that a few conversations could have ruled out in a week.
A polished plan from a chat window is still a guess until real customers behave the way it predicts.
Without a record of what you tested and what happened, every decision is made from memory and mood.
How it works
Four short answers. About three minutes.
The 3–5 assumptions your idea depends on, and which one is riskiest.
One cheap, real-world experiment, with success, failure, and a decision rule set in advance.
Positive, negative, or uncertain — weighted by how strong the evidence is.
Build, narrow, or stop, based on how your confidence moved and why. Then review the week.
A week in FounderOS
The same example as above, step by step. The answer wasn't “build it” — and finding that out took days, not months.
Example Example workflow — not real customer data.
Monday
A client-feedback workflow for independent designers. The diagnosis lists four assumptions; pricing is the riskiest.
Tuesday
Five problem interviews. Success: 3 of 5 describe the problem unprompted and 2 ask about price.
Thursday
4 interviews completed. 3 said the problem exists, but 2 currently solve it manually and only 1 expressed willingness to pay.
Thursday
Demand confidence moves from 5/10 to 4/10, with the reason written next to the number.
Sunday
Test a smaller manual service before building software.
Why not just ask an AI chat?
General-purpose AI chats are useful for thinking out loud. They aren't built to hold a founder to a test, a result, and a decision.
| A blank AI chat | FounderOS | |
|---|---|---|
| Memory | Starts from a blank page each time unless you paste everything back in. | Keeps every assumption, experiment, and result for the idea. |
| What it rests on | Answers from general knowledge and whatever you typed. | Every recommendation points to the evidence you recorded. |
| Changing its mind | Can agree with you if you rephrase the question. | Confidence only moves when new evidence is recorded — and says why. |
| Bad news | Easy to scroll past. | Negative results stay in the ledger and count toward the decision. |
| Before the test | Rarely asks what result would change your plan. | Sets success, failure, and a decision rule before you start. |
Inside the product
These are the real FounderOS components. Example workflow — not real customer data.
One experiment at a time, aimed at your riskiest assumption. What counts as success, what counts as failure, and what you'll do either way are written down before you start.
Customer interviewsIn progress
We believe designers lose hours to client feedback rounds and would pay to shorten them.
Decision rule: if fewer than 2 would pay, test a manual service before building software.
Example workflow — not real customer data.
Every result, including the disappointing ones, with its strength and the assumption it tested. Your decision status is calculated from this record — never from an AI prediction.
4 interviews completed. 3 said the problem exists, but 2 currently solve it manually and only 1 expressed willingness to pay.
Confidence 5 → 4/10 · Only 1 of 4 designers said they would pay, and 2 already manage with a manual process.
12 of 20 survey respondents called client feedback rounds their most frustrating task.
Landing page: 64 visits and 5 waitlist sign-ups. No replies to the pricing question yet.
Negative evidence is never hidden. Your decision status is computed only from what you record.
Example workflow — not real customer data.
When you record evidence, you see exactly how your confidence changed and why. A number never moves silently.
5/104/10
Confidence decreased from 5/10 to 4/10: 3 of 4 designers confirmed the problem, but only 1 said they would pay and 2 already solve it manually.
Assumption: Independent designers will pay ₹1,000 per month for this workflow.
Computed from your evidence weighting: strong moves 2 points, moderate 1, weak or uncertain none.
Example workflow — not real customer data.
Fifteen honest minutes: what you tested, what got stronger or weaker, what you avoided, and one priority for next week.
You tested your riskiest assumption this week and the result was mixed: the problem is real, but willingness to pay is weak. That is progress — it tells you what not to build yet.
Worth noticing: You haven't asked anyone to pay yet. A small paid pilot would answer the pricing question faster than more interviews.
Focus for next week: Offer a manual feedback-round service to three designers at a small fee.
Example workflow — not real customer data.
Pricing
Know whether to build, narrow, or stop your idea — based on evidence you collected, not AI opinions.
₹0
Start testing one idea.
₹999per month
Build a repeatable validation system around your ideas.
Paid access is not available yet. Join the waitlist to be notified.
No payment details. No account needed.
Questions
No. FounderOS is a structured way to test an idea with real customers and keep a record of what happened. AI helps draft assumptions and experiments and summarise your own evidence; it does not decide for you, and it does not pretend to be an expert or a real person.
No. Nothing can guarantee success, revenue, funding, or profitability. FounderOS helps you find weak assumptions early, so your decisions rest on evidence rather than hope.
No. It doesn't browse the web or verify market data, and it won't invent statistics or competitor facts. It helps you design research you run yourself, and treats what you record as the evidence.
The AI feature you used stops for that allowance and tells you so. Everything else keeps working: you can add assumptions, run experiments, record evidence, and write your weekly review by hand. You can also join the Pro waitlist.
Every AI request has a real cost. The paid plan has higher limits with fair use, so the product stays affordable and nobody's usage degrades it for everyone else.
No. The experiments FounderOS suggests — customer conversations, pre-orders, manual services, simple landing pages — need no code.
No. FounderOS provides educational and strategic guidance. For legal, tax, accounting, investment, or financial decisions, work with qualified professionals.
Four questions, about three minutes, to your Founder Diagnosis and your first real-world test.
Validate My Idea