/interview
YC interview prep: clear answers, not a script.
Use these ten practice questions to explain your product, users and progress clearly. Prepare your numbers and a working demo, but do not memorise a pitch or assume these are the exact questions you will get.
10 min
Hard cap
2-3
Partners
Live demo
Be ready
Q1
What does your company do?
Why asked:First question, every interview. Tests whether you can be clear under pressure.
How to answer:One sentence. No buzzwords. 'We make X for Y so they can Z.' Practice it 50 times.
Trap:If you ramble for 30 seconds, the rest of the interview is uphill.
Q2
Why is now the right time?
Why asked:Tests whether you understand market timing or are just chasing a trend.
How to answer:Pick 2–3 specific shifts (regulation, tech cost curve, consumer behavior, distribution channel) and explain why they unlock this idea now.
Trap:'AI is hot' is not an answer. Be specific about what changed in the last 18 months.
Q3
Who's your competition? Why will you win?
Why asked:Tests how seriously you take the market.
How to answer:Name 3 real competitors (not 'no one else does this'). Pick one specific wedge: distribution, price, depth in a vertical, founder background.
Trap:Saying 'we have no competition' = rejection. They will Google for 30 seconds and find 5.
Q4
Why you? Why are you the right team?
Why asked:YC bets on people more than ideas. They want a reason this team will outlast the inevitable rough patches.
How to answer:Concrete story: how you met, what you've shipped together, why you're suited for this specific market.
Trap:Don't list resumes. They want chemistry and grit, not credentials.
Q5
What's your growth?
Why asked:If you're post-launch, this is THE question. Numbers don't lie.
How to answer:Week-over-week growth %, MRR or active users, retention. Be brutally honest. If growth is bad, have a real diagnosis.
Trap:Inflating numbers is suicide. They check refs. They'll catch it.
Q6
What have you learned from your users?
Why asked:Tests whether you actually talk to them.
How to answer:Specific, recent stories. 'Last week a customer told us X, so we shipped Y on Tuesday and now Z is happening.'
Trap:Generic answers ('users love it') = you don't talk to users.
Q7
How big can this be?
Why asked:YC needs to believe at least one path exists to a multi-billion dollar outcome.
How to answer:Bottom-up TAM math. Start from 'X users × $Y price' not 'the market is $Z trillion.'
Trap:Top-down market size slides feel lazy. They want first-principles math.
Q8
What would you do with the YC money?
Why asked:Tests whether you have a clear plan for the next 6 months.
How to answer:Specifics: '2 engineers + extend runway 9 months + $20k/mo on paid acquisition tests.'
Trap:'We'd hire a marketing team' = not the answer for a YC stage company.
Q9
What's the hardest thing about this business?
Why asked:Tests self-awareness. Founders who can't answer this are founders who haven't really thought.
How to answer:Honest. Pick the real hard thing (regulation, sales cycle, GTM, technical risk). Show you have a plan.
Trap:'Nothing, we got it figured out' = arrogance flag.
Q10
If we don't fund you, what will you do?
Why asked:Tests commitment. They want founders who'll do this either way.
How to answer:'Keep building. We'll bootstrap from revenue / raise from angels / both.'
Trap:'We'd probably go back to our jobs' = instant rejection.
How to prepare for a YC interview
- Write down your current revenue, active users and growth, including the date and how you measured each number.
- Run one short mock conversation. Have someone ask follow-up questions rather than read a fixed script.
- Check screen sharing and keep a working product demo ready. Show the main user action, not a slide deck.
- Agree who knows each part of the business, while making sure every founder can explain the product.
- Keep building and talking to users. Bring any real progress since your application.
YC interview practice questions
How do I run a YC mock interview?
Use a short timed conversation about your product, users, revenue and recent progress. Ask your practice partner to follow up on unclear answers. Afterwards, check which numbers or explanations were missing. The goal is clear thinking, not memorising a script.
Should I memorise answers for a YC interview?
No. YC advises against over-rehearsing. Know your business and your numbers, then answer the question actually asked. A polished speech can get in the way of a useful conversation.
Should I prepare a product demo for my YC interview?
Yes. Keep a working demo ready in case partners ask to see it. Test screen sharing and show the key thing a user does. Be honest about what works today and what is still a prototype.
What should I do if a YC partner interrupts me?
Pause and listen to the new question. Answer it directly instead of trying to finish your prepared explanation. An interruption alone does not tell you whether the interview is going well or badly.
Source: YC interview guide. The practice plan above is our suggested checklist, not an official YC script.
Drill on paper
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