How to validate a business idea

Not all validation evidence is equal. Order them from weakest to strongest:

1. Compliments — "Great idea!" Nearly worthless. Your friends will lie to spare your feelings.
2. Survey responses — "Yes, I'd use this." Slightly better, still cheap talk.
3. Email signups for a waitlist — Weak. People sign up for things they'll never buy.
4. Interview pain admission — "I'm currently doing X manually and it kills me." Real signal.
5. Time given — "Yes, I'll spend 30 minutes on a call to walk you through how I do this today." Strong signal.
6. Pre-orders / paid LOIs — "I'll pay you $500 now to be customer #1." Almost the only signal that matters.

If you don't have at least 3-5 hits at level 4 or above, you don't have validation. You have hope.

The biggest mistake first-time founders make in interviews is pitching. Don't. The customer is the data source; you are the interviewer.

Three rules:

1. Ask about the past, not the future. "Walk me through the last time you did X" beats "Would you use a tool that does X?"
2. Specifics beat opinions. "What was annoying about that?" beats "What features do you want?"
3. Listen for pain you can hear. When someone tells you about a problem with audible frustration in their voice, that's the signal.

After 5 interviews you'll see patterns. After 10 you'll know if you have a real problem. Use the Customer Discovery Script as a starting point; adapt to your context.

A smoke test is a landing page that pretends the product exists, with a real call to action. Done well: high signal. Done badly: garbage.

What works:

• Real, specific value prop. "Schedule meetings 10× faster with AI" is bad. "AI scheduler for solo founders that books deep-work blocks first" is testable.
• Realistic price, not "Coming soon, get on the waitlist."
• Friction at the right point. "Pre-order for $99" produces signal. "Sign up for early access" doesn't.
• Tracking the right metric. Conversion rate from real traffic (not your network) is the only metric that matters.

What doesn't:

• Promoting the page to your audience and counting their signups as validation
• Free signup as the conversion event ("I'd try it for free!" — of course they would)
• Cute features and design before the offer works

For the right kind of business, the fastest validation is to deliver the outcome manually for the first 5 customers, charging real money, with zero code.

A SaaS that automates accounting? Do their accounting by hand for $500/mo. A content tool that finds keywords? Run the keyword research yourself in Google Docs.

If your first 5 customers pay you $500/mo each to do the thing manually, you have an idea worth automating. If you can't find 5 paying customers for the manual version, you don't have a software business — you have a hobby.

You're validated enough to build when you can answer all of these:

• "Who exactly is the customer?" — Specific role + company size + situation.
• "What pain are they hiring you to solve?" — One sentence, plain English.
• "How are they solving it today?" — Without your product. (This is the real competition.)
• "Why is the current solution not enough?" — Specific frustration, not generic complaint.
• "What will they pay?" — Real numbers from a real conversation, not your guess.

If any of those answers is vague, do another round of interviews. Building before this is the most common way to waste a year.